Update test expectations

Roslyn no longer reports CS1998
dotnet/roslyn#77001

Author: davidwengier

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Await_DesignTime.cs-diagnostics.txt

@@ -1,7 +1,4 @@
-// TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Await.cshtml(2,31): warning CS1998: This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.
-//     public async Task<string> Foo()
-Diagnostic(ErrorCode.WRN_AsyncLacksAwaits, "Foo").WithLocation(2, 31),
-// TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Await.cshtml(14,55): error CS1525: Invalid expression term ';'
+// TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Await.cshtml(14,55): error CS1525: Invalid expression term ';'
 //                                            __o = await;
 Diagnostic(ErrorCode.ERR_InvalidExprTerm, ";").WithArguments(";").WithLocation(14, 55),
 // TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Await.cshtml(19,49): error CS1501: No overload for method 'Foo' takes 2 arguments

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Await_Runtime.cs-diagnostics.txt

@@ -1,7 +1,4 @@
-// TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Await.cshtml(2,31): warning CS1998: This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.
-//     public async Task<string> Foo()
-Diagnostic(ErrorCode.WRN_AsyncLacksAwaits, "Foo").WithLocation(2, 31),
-// TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Await.cshtml(14,55): error CS1525: Invalid expression term ')'
+// TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Await.cshtml(14,55): error CS1525: Invalid expression term ')'
 // await
 Diagnostic(ErrorCode.ERR_InvalidExprTerm, "").WithArguments(")").WithLocation(14, 55),
 // TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Await.cshtml(19,49): error CS1501: No overload for method 'Foo' takes 2 arguments

src/Compiler/Microsoft.AspNetCore.Razor.Language/test/TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Markup_InCodeBlocksWithTagHelper_Runtime.cs-diagnostics.txt

@@ -4,9 +4,6 @@ Diagnostic(ErrorCode.ERR_BadAwaitWithoutVoidAsyncMethod, "await __tagHelperRunne
 // TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Markup_InCodeBlocksWithTagHelper.cshtml(81,17): error CS4033: The 'await' operator can only be used within an async method. Consider marking this method with the 'async' modifier and changing its return type to 'Task'.
 //                 await __tagHelperExecutionContext.SetOutputContentAsync();
 Diagnostic(ErrorCode.ERR_BadAwaitWithoutVoidAsyncMethod, "await __tagHelperExecutionContext.SetOutputContentAsync()").WithLocation(81, 17),
-// TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Markup_InCodeBlocksWithTagHelper.cshtml(126,193): warning CS1998: This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.
-//         __tagHelperExecutionContext = __tagHelperScopeManager.Begin("div", global::Microsoft.AspNetCore.Razor.TagHelpers.TagMode.StartTagAndEndTag, "__UniqueIdSuppressedForTesting__", async() => {
-Diagnostic(ErrorCode.WRN_AsyncLacksAwaits, "=>").WithLocation(126, 193),
 // TestFiles/IntegrationTests/CodeGenerationIntegrationTest/Markup_InCodeBlocksWithTagHelper.cshtml(142,9): error CS4032: The 'await' operator can only be used within an async method. Consider marking this method with the 'async' modifier and changing its return type to 'Task<Task>'.
 //         await __tagHelperRunner.RunAsync(__tagHelperExecutionContext);
 Diagnostic(ErrorCode.ERR_BadAwaitWithoutAsyncMethod, "await __tagHelperRunner.RunAsync(__tagHelperExecutionContext)").WithArguments("System.Threading.Tasks.Task").WithLocation(142, 9),

src/Compiler/test/Microsoft.NET.Sdk.Razor.SourceGenerators.Tests/RazorSourceGeneratorTests.cs

@@ -1429,14 +1429,7 @@ public override void Process(TagHelperContext context, TagHelperOutput output)
             var driver = await GetDriverAsync(project);
 
             // Act
-            var result = RunGenerator(compilation!, ref driver,
-                // Microsoft.NET.Sdk.Razor.SourceGenerators/Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGenerator/Pages_Index_cshtml.g.cs(68,167): warning CS1998: This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.
-                //         __tagHelperExecutionContext = __tagHelperScopeManager.Begin("email", global::Microsoft.AspNetCore.Razor.TagHelpers.TagMode.StartTagAndEndTag, "test", async() => {
-                Diagnostic(ErrorCode.WRN_AsyncLacksAwaits, "=>").WithLocation(68, 167),
-                // Microsoft.NET.Sdk.Razor.SourceGenerators/Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGenerator/Pages_Index_cshtml.g.cs(84,171): warning CS1998: This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.
-                //             __tagHelperExecutionContext = __tagHelperScopeManager.Begin("email", global::Microsoft.AspNetCore.Razor.TagHelpers.TagMode.StartTagAndEndTag, "test", async() => {
-                Diagnostic(ErrorCode.WRN_AsyncLacksAwaits, "=>").WithLocation(84, 171)
-            );
+            var result = RunGenerator(compilation!, ref driver);
 
             // Assert
             Assert.Empty(result.Diagnostics);