Update comments for some remaining exclusions

src/Analyzers/CSharp/Tests/RemoveUnusedParametersAndValues/RemoveUnusedParametersTests.cs

@@ -1367,8 +1367,7 @@ public C(Task<I> [|task|])
 }", options);
         }
 
-#if !CODE_STYLE // Below test is not applicable for CodeStyle layer as attempting to fetch
-        // an editorconfig string representation for this invalid option fails.
+#if !CODE_STYLE // Below test is not applicable for CodeStyle layer as attempting to fetch an editorconfig string representation for this invalid option fails.
         [WorkItem(37326, "https://github.com/dotnet/roslyn/issues/37326")]
         [Fact, Trait(Traits.Feature, Traits.Features.CodeActionsRemoveUnusedParameters)]
         public async Task RegressionTest_ShouldReportUnusedParameter_02()

src/Analyzers/Core/Analyzers/RemoveUnnecessarySuppressions/AbstractRemoveUnnecessaryPragmaSuppressionsDiagnosticAnalyzer.cs

@@ -101,7 +101,7 @@ protected sealed override void InitializeWorker(AnalysisContext context)
             // However, this is a special analyzer that is directly invoked by the analysis host (IDE), so we do this check here.
             ReportDiagnostic severity;
             if (
-#if !CODE_STYLE
+#if !CODE_STYLE // Uses Roslyn 3.8 API
                 compilationWithAnalyzers.Compilation.Options.SyntaxTreeOptionsProvider != null &&
                 compilationWithAnalyzers.Compilation.Options.SyntaxTreeOptionsProvider.TryGetDiagnosticValue(tree, IDEDiagnosticIds.RemoveUnnecessarySuppressionDiagnosticId, out severity) ||
 #endif

src/Workspaces/SharedUtilitiesAndExtensions/Workspace/CSharp/Extensions/ContextQuery/SyntaxTreeExtensions.cs

@@ -1121,7 +1121,7 @@ public static bool IsDefaultExpressionContext(this SyntaxTree syntaxTree, int po
                 return true;
             }
 
-#if !CODE_STYLE
+#if !CODE_STYLE // FunctionPointerParameterListSyntax added in 3.8
             if (token.IsKind(SyntaxKind.CommaToken) &&
                 token.Parent.IsKind(SyntaxKindEx.FunctionPointerParameterList, out FunctionPointerParameterListSyntax funcPtrParamList))
             {