Remove duplicate simplified layout check (#40060)

app/javascript/mastodon/features/ui/index.jsx

@@ -121,6 +121,7 @@ class SwitchingColumnsArea extends PureComponent {
     singleColumn: PropTypes.bool,
     layout: PropTypes.string.isRequired,
     forceOnboarding: PropTypes.bool,
+    minimalShell: PropTypes.bool,
   };
 
   componentDidMount () {
@@ -158,7 +159,7 @@ class SwitchingColumnsArea extends PureComponent {
   };
 
   render () {
-    const { children, singleColumn, forceOnboarding } = this.props;
+    const { children, singleColumn, forceOnboarding, minimalShell } = this.props;
     const { signedIn } = this.props.identity;
     const pathName = this.props.location.pathname;
 
@@ -185,7 +186,7 @@ class SwitchingColumnsArea extends PureComponent {
 
     return (
       <ColumnsContextProvider multiColumn={!singleColumn}>
-        <ColumnsArea ref={this.setRef} singleColumn={singleColumn} domain={domain} minimalShell={!signedIn && landingPage === 'overview' && pathName.startsWith('/overview')}>
+        <ColumnsArea ref={this.setRef} singleColumn={singleColumn} domain={domain} minimalShell={minimalShell}>
           <WrappedSwitch>
             <Redirect from='/' to={{pathname: rootRedirect, state: {...this.props.location.state, focusTarget: false}}} exact />
 
@@ -651,6 +652,7 @@ class UI extends PureComponent {
             singleColumn={layout === 'mobile' || layout === 'single-column'}
             layout={layout}
             forceOnboarding={firstLaunch && newAccount}
+            minimalShell={minimalShell}
           >
             {children}
           </SwitchingColumnsArea>