WiimoteReal: Remove unused IsReady and IsScannerReady functions

The only call of `IsScannerReady` was removed by
81be0001a9, and most of the `IsReady`
functions were only called by `IsScannerReady`.

The one exception was in `WiimoteScannerLinux`, which is now a private
function instead of inheriting from the one in `WiimoteScannerBackend`.

Source/Core/Core/HW/WiimoteReal/IOAndroid.h

@@ -48,7 +48,6 @@ class WiimoteScannerAndroid final : public WiimoteScannerBackend
 public:
   WiimoteScannerAndroid() = default;
   ~WiimoteScannerAndroid() override = default;
-  bool IsReady() const override { return true; }
 
   FindResults FindAttachedWiimotes() override;
 

Source/Core/Core/HW/WiimoteReal/IODummy.h

@@ -12,7 +12,6 @@ class WiimoteScannerDummy final : public WiimoteScannerBackend
 public:
   WiimoteScannerDummy() = default;
   ~WiimoteScannerDummy() override = default;
-  bool IsReady() const override { return false; }
   void Update() override {}
   void RequestStopSearching() override {}
 };

Source/Core/Core/HW/WiimoteReal/IOLinux.h

@@ -41,8 +41,6 @@ public:
   WiimoteScannerLinux();
   ~WiimoteScannerLinux() override;
 
-  bool IsReady() const override;
-
   // FYI: This backend only supports connecting remotes just found via Bluetooth inquiry.
   FindResults FindNewWiimotes() override;
 
@@ -52,6 +50,7 @@ public:
 private:
   bool Open();
   void Close();
+  bool IsReady() const;
 
   int m_device_id{-1};
   int m_device_sock{-1};

Source/Core/Core/HW/WiimoteReal/IOWin.cpp

@@ -754,14 +754,4 @@ auto WiimoteScannerWindows::FindAttachedWiimotes() -> FindResults
   return FindWiimoteHIDDevices();
 }
 
-bool WiimoteScannerWindows::IsReady() const
-{
-  bool found_radio = false;
-  EnumerateRadios([&](auto) {
-    found_radio = true;
-    return EnumerationControl::Stop;
-  });
-  return found_radio;
-}
-
 }  // namespace WiimoteReal

Source/Core/Core/HW/WiimoteReal/IOWin.h

@@ -62,7 +62,6 @@ public:
   };
 
   WiimoteScannerWindows();
-  bool IsReady() const override;
 
   FindResults FindNewWiimotes() override;
   FindResults FindAttachedWiimotes() override;

Source/Core/Core/HW/WiimoteReal/IOhidapi.cpp

@@ -103,11 +103,6 @@ WiimoteScannerHidapi::~WiimoteScannerHidapi()
     ERROR_LOG_FMT(WIIMOTE, "Failed to clean up hidapi.");
 }
 
-bool WiimoteScannerHidapi::IsReady() const
-{
-  return true;
-}
-
 auto WiimoteScannerHidapi::FindAttachedWiimotes() -> FindResults
 {
   FindResults results;

Source/Core/Core/HW/WiimoteReal/IOhidapi.h

@@ -35,7 +35,6 @@ class WiimoteScannerHidapi final : public WiimoteScannerBackend
 public:
   WiimoteScannerHidapi();
   ~WiimoteScannerHidapi() override;
-  bool IsReady() const override;
 
   FindResults FindAttachedWiimotes() override;
 

Source/Core/Core/HW/WiimoteReal/WiimoteReal.cpp

@@ -127,11 +127,6 @@ void ProcessWiimotePool()
   }
 }
 
-bool IsScannerReady()
-{
-  return s_wiimote_scanner.IsReady();
-}
-
 void AddWiimoteToPool(std::unique_ptr<Wiimote> wiimote)
 {
   // Our real wiimote class requires an index.
@@ -592,12 +587,6 @@ void WiimoteScanner::SetScanMode(WiimoteScanMode scan_mode)
   m_scan_mode_changed_or_population_event.Set();
 }
 
-bool WiimoteScanner::IsReady() const
-{
-  std::lock_guard lg(m_backends_mutex);
-  return std::ranges::any_of(m_backends, &WiimoteScannerBackend::IsReady);
-}
-
 static void CheckForDisconnectedWiimotes()
 {
   std::lock_guard lk(g_wiimotes_mutex);

Source/Core/Core/HW/WiimoteReal/WiimoteReal.h

@@ -181,9 +181,6 @@ class WiimoteScannerBackend
 public:
   virtual ~WiimoteScannerBackend() = default;
 
-  // Note: Invoked from UI thread.
-  virtual bool IsReady() const = 0;
-
   // function called when not looking for more Wiimotes
   virtual void Update() = 0;
   // requests the backend to stop scanning if FindWiimotes is blocking
@@ -220,8 +217,6 @@ public:
   void SetScanMode(WiimoteScanMode scan_mode);
   void PopulateDevices();
 
-  bool IsReady() const;
-
 private:
   void ThreadFunc();
   void PoolThreadFunc();
@@ -259,5 +254,4 @@ void InitAdapterClass();
 void HandleWiimotesInControllerInterfaceSettingChange();
 void PopulateDevices();
 void ProcessWiimotePool();
-bool IsScannerReady();
 }  // namespace WiimoteReal