diff --git a/Source/Core/Common/CMakeLists.txt b/Source/Core/Common/CMakeLists.txt
index 894fd38128..c7459b0853 100644
--- a/Source/Core/Common/CMakeLists.txt
+++ b/Source/Core/Common/CMakeLists.txt
@@ -132,7 +132,6 @@ add_library(common
   ScopeGuard.h
   SDCardUtil.cpp
   SDCardUtil.h
-  Semaphore.h
   SettingsHandler.cpp
   SettingsHandler.h
   SFMLHelper.cpp
@@ -142,7 +141,6 @@ add_library(common
   SocketContext.h
   SpanUtils.h
   SPSCQueue.h
-  StringLiteral.h
   StringUtil.cpp
   StringUtil.h
   SymbolDB.cpp
diff --git a/Source/Core/Common/Semaphore.h b/Source/Core/Common/Semaphore.h
deleted file mode 100644
index cc87550148..0000000000
--- a/Source/Core/Common/Semaphore.h
+++ /dev/null
@@ -1,72 +0,0 @@
-// Copyright 2016 Dolphin Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-#pragma once
-
-#ifdef _WIN32
-
-#include <Windows.h>
-
-namespace Common
-{
-class Semaphore
-{
-public:
-  Semaphore(int initial_count, int maximum_count)
-  {
-    m_handle = CreateSemaphoreA(nullptr, initial_count, maximum_count, nullptr);
-  }
-
-  ~Semaphore() { CloseHandle(m_handle); }
-  void Wait() { WaitForSingleObject(m_handle, INFINITE); }
-  void Post() { ReleaseSemaphore(m_handle, 1, nullptr); }
-
-private:
-  HANDLE m_handle;
-};
-}  // namespace Common
-
-#elif defined(__APPLE__)
-
-#include <dispatch/dispatch.h>
-
-namespace Common
-{
-class Semaphore
-{
-public:
-  Semaphore(int initial_count, int maximum_count)
-  {
-    m_handle = dispatch_semaphore_create(0);
-    for (int i = 0; i < initial_count; i++)
-      dispatch_semaphore_signal(m_handle);
-  }
-  ~Semaphore() { dispatch_release(m_handle); }
-  void Wait() { dispatch_semaphore_wait(m_handle, DISPATCH_TIME_FOREVER); }
-  void Post() { dispatch_semaphore_signal(m_handle); }
-
-private:
-  dispatch_semaphore_t m_handle;
-};
-}  // namespace Common
-
-#else
-
-#include <semaphore.h>
-
-namespace Common
-{
-class Semaphore
-{
-public:
-  Semaphore(int initial_count, int maximum_count) { sem_init(&m_handle, 0, initial_count); }
-  ~Semaphore() { sem_destroy(&m_handle); }
-  void Wait() { sem_wait(&m_handle); }
-  void Post() { sem_post(&m_handle); }
-
-private:
-  sem_t m_handle;
-};
-}  // namespace Common
-
-#endif  // _WIN32
diff --git a/Source/Core/Common/StringLiteral.h b/Source/Core/Common/StringLiteral.h
deleted file mode 100644
index 6da9afd24d..0000000000
--- a/Source/Core/Common/StringLiteral.h
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright 2023 Dolphin Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-#pragma once
-
-#include <algorithm>
-
-namespace Common
-{
-// A useful template for passing string literals as arguments to templates
-// from: https://ctrpeach.io/posts/cpp20-string-literal-template-parameters/
-template <size_t N>
-struct StringLiteral
-{
-  consteval StringLiteral(const char (&str)[N]) { std::copy_n(str, N, value); }
-
-  char value[N];
-};
-
-}  // namespace Common
diff --git a/Source/Core/Core/CMakeLists.txt b/Source/Core/Core/CMakeLists.txt
index e411239d17..996b63e22b 100644
--- a/Source/Core/Core/CMakeLists.txt
+++ b/Source/Core/Core/CMakeLists.txt
@@ -71,7 +71,6 @@ add_library(core
   Debugger/Debugger_SymbolMap.h
   Debugger/Dump.cpp
   Debugger/Dump.h
-  Debugger/GCELF.h
   Debugger/OSThread.cpp
   Debugger/OSThread.h
   Debugger/PPCDebugInterface.cpp
diff --git a/Source/Core/Core/Debugger/GCELF.h b/Source/Core/Core/Debugger/GCELF.h
deleted file mode 100644
index 18faa4813e..0000000000
--- a/Source/Core/Core/Debugger/GCELF.h
+++ /dev/null
@@ -1,110 +0,0 @@
-// Copyright 2008 Dolphin Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-#pragma once
-
-// ELF File Types
-#define ET_NONE 0         // No file type
-#define ET_REL 1          // Relocatable file
-#define ET_EXEC 2         // Executable file
-#define ET_DYN 3          // Shared object file
-#define ET_CORE 4         // Core file
-#define ET_LOPROC 0xFF00  // Processor specific
-#define ET_HIPROC 0xFFFF  // Processor specific
-
-// ELF Machine Types
-#define EM_NONE 0         // No machine
-#define EM_M32 1          // AT&T WE 32100
-#define EM_SPARC 2        // SPARC
-#define EM_386 3          // Intel Architecture
-#define EM_68K 4          // Motorola 68000
-#define EM_88K 5          // Motorola 88000
-#define EM_860 6          // Intel 80860
-#define EM_MIPS 7         // MIPS RS3000 Big-Endian
-#define EM_MIPS_RS4_BE 8  // MIPS RS4000 Big-Endian
-#define EM_ARM 40         // ARM/Thumb Architecture
-
-// ELF Version Types
-#define EV_NONE 0     // Invalid version
-#define EV_CURRENT 1  // Current version
-
-// ELF Section Header Types
-#define SHT_NULL 0
-#define SHT_PROGBITS 1
-#define SHT_SYMTAB 2
-#define SHT_STRTAB 3
-#define SHT_RELA 4
-#define SHT_HASH 5
-#define SHT_DYNAMIC 6
-#define SHT_NOTE 7
-#define SHT_NOBITS 8
-#define SHT_REL 9
-#define SHT_SHLIB 10
-#define SHT_DYNSYM 11
-
-struct ELF_Header
-{
-  unsigned char ID[4];
-  unsigned char clazz;
-  unsigned char data;
-  unsigned char version;
-  unsigned char pad[9];
-  unsigned short e_type;     // ELF file type
-  unsigned short e_machine;  // ELF target machine
-  unsigned int e_version;    // ELF file version number
-  unsigned int e_entry;
-  unsigned int e_phoff;
-  unsigned int e_shoff;
-  unsigned int e_flags;
-  unsigned short e_ehsize;
-  unsigned short e_phentsize;
-  unsigned short e_phnum;
-  unsigned short e_shentsize;
-  unsigned short e_shnum;
-  unsigned short e_shtrndx;
-};
-
-struct Program_Header
-{
-  unsigned int type;
-  unsigned int offset;
-  unsigned int vaddr;
-  unsigned int paddr;
-  unsigned int filesz;
-  unsigned int memsz;
-  unsigned int flags;
-  unsigned int align;
-};
-
-struct Section_Header
-{
-  unsigned int name;
-  unsigned int type;
-  unsigned int flags;
-  unsigned int addr;
-  unsigned int offset;
-  unsigned int size;
-  unsigned int link;
-  unsigned int info;
-  unsigned int addralign;
-  unsigned int entsize;
-};
-
-struct Symbol_Header
-{
-  unsigned int name;
-  unsigned int value;
-  unsigned int size;
-  unsigned char info;
-  unsigned char other;
-  unsigned short shndx;
-};
-
-struct Rela_Header
-{
-  unsigned int offset;
-  unsigned int info;
-  signed int addend;
-};
-
-const char ELFID[4] = {0x7F, 'E', 'L', 'F'};
diff --git a/Source/Core/DolphinLib.props b/Source/Core/DolphinLib.props
index 9959caf60c..f1dec7b3b5 100644
--- a/Source/Core/DolphinLib.props
+++ b/Source/Core/DolphinLib.props
@@ -159,14 +159,12 @@
     <ClInclude Include="Common\scmrev.h" />
     <ClInclude Include="Common\ScopeGuard.h" />
     <ClInclude Include="Common\SDCardUtil.h" />
-    <ClInclude Include="Common\Semaphore.h" />
     <ClInclude Include="Common\SettingsHandler.h" />
     <ClInclude Include="Common\SFMLHelper.h" />
     <ClInclude Include="Common\SmallVector.h" />
     <ClInclude Include="Common\SocketContext.h" />
     <ClInclude Include="Common\SpanUtils.h" />
     <ClInclude Include="Common\SPSCQueue.h" />
-    <ClInclude Include="Common\StringLiteral.h" />
     <ClInclude Include="Common\StringUtil.h" />
     <ClInclude Include="Common\Swap.h" />
     <ClInclude Include="Common\SymbolDB.h" />
@@ -222,7 +220,6 @@
     <ClInclude Include="Core\Debugger\DebugInterface.h" />
     <ClInclude Include="Core\Debugger\Debugger_SymbolMap.h" />
     <ClInclude Include="Core\Debugger\Dump.h" />
-    <ClInclude Include="Core\Debugger\GCELF.h" />
     <ClInclude Include="Core\Debugger\OSThread.h" />
     <ClInclude Include="Core\Debugger\PPCDebugInterface.h" />
     <ClInclude Include="Core\Debugger\RSO.h" />
@@ -633,7 +630,6 @@
     <ClInclude Include="VideoBackends\Null\PerfQuery.h" />
     <ClInclude Include="VideoBackends\Null\TextureCache.h" />
     <ClInclude Include="VideoBackends\Null\VideoBackend.h" />
-    <ClInclude Include="VideoBackends\OGL\GPUTimer.h" />
     <ClInclude Include="VideoBackends\OGL\OGLBoundingBox.h" />
     <ClInclude Include="VideoBackends\OGL\OGLConfig.h" />
     <ClInclude Include="VideoBackends\OGL\OGLGfx.h" />
diff --git a/Source/Core/VideoBackends/OGL/CMakeLists.txt b/Source/Core/VideoBackends/OGL/CMakeLists.txt
index 30c4f98ba2..d48624b7e7 100644
--- a/Source/Core/VideoBackends/OGL/CMakeLists.txt
+++ b/Source/Core/VideoBackends/OGL/CMakeLists.txt
@@ -1,5 +1,4 @@
 add_library(videoogl
-  GPUTimer.h
   OGLBoundingBox.cpp
   OGLBoundingBox.h
   OGLConfig.cpp
diff --git a/Source/Core/VideoBackends/OGL/GPUTimer.h b/Source/Core/VideoBackends/OGL/GPUTimer.h
deleted file mode 100644
index 2beefa839e..0000000000
--- a/Source/Core/VideoBackends/OGL/GPUTimer.h
+++ /dev/null
@@ -1,104 +0,0 @@
-// Copyright 2016 Dolphin Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-#pragma once
-
-#include "Common/GL/GLExtensions/GLExtensions.h"
-
-#ifndef GL_TIME_ELAPSED
-#define GL_TIME_ELAPSED 0x88BF
-#endif
-
-namespace OGL
-{
-/*
- * This class can be used to measure the time it takes for the GPU to perform a draw call
- * or compute dispatch. To use:
- *
- *   - Create an instance of GPUTimer before issuing the draw call.
- *     (this can be before or after any binding that needs to be done)
- *
- *   - (optionally) call Begin(). This is not needed for a single draw call.
- *
- *   - Issue the draw call or compute dispatch as normal.
- *
- *   - (optionally) call End(). This is not necessary for a single draw call.
- *
- *   - Call GetTime{Seconds,Milliseconds,Nanoseconds} to determine how long the operation
- *     took to execute on the GPU.
- *
- * NOTE: When the timer is read back, this will force a GL flush, so the more often a timer is used,
- * the larger of a performance impact it will have. Only one timer can be active at any time, due to
- * using GL_TIME_ELAPSED. This is not enforced by the class, however.
- *
- */
-class GPUTimer final
-{
-public:
-  GPUTimer()
-  {
-    glGenQueries(1, &m_query_id);
-    Begin();
-  }
-
-  ~GPUTimer()
-  {
-    End();
-    glDeleteQueries(1, &m_query_id);
-  }
-
-  void Begin()
-  {
-    if (m_started)
-      glEndQuery(GL_TIME_ELAPSED);
-
-    glBeginQuery(GL_TIME_ELAPSED, m_query_id);
-    m_started = true;
-  }
-
-  void End()
-  {
-    if (!m_started)
-      return;
-
-    glEndQuery(GL_TIME_ELAPSED);
-    m_started = false;
-  }
-
-  double GetTimeSeconds()
-  {
-    GetResult();
-    return static_cast<double>(m_result) / 1000000000.0;
-  }
-
-  double GetTimeMilliseconds()
-  {
-    GetResult();
-    return static_cast<double>(m_result) / 1000000.0;
-  }
-
-  u32 GetTimeNanoseconds()
-  {
-    GetResult();
-    return m_result;
-  }
-
-private:
-  void GetResult()
-  {
-    if (m_has_result)
-      return;
-
-    if (m_started)
-      End();
-
-    glGetQueryObjectuiv(m_query_id, GL_QUERY_RESULT, &m_result);
-    m_has_result = true;
-  }
-
-  GLuint m_query_id;
-  GLuint m_result = 0;
-  bool m_started = false;
-  bool m_has_result = false;
-};
-}  // namespace OGL