Remove unnecessary pragmas (#55810)

* Remove unnecessary pragmas

...now that dotnet/linker#2715 has been fixed.

* Remove some additional suppressions

* Fix build

* Add RequiresDynamicCode attribute because we are using MakeGenericMethod on a Type that may be a value type.

---------

Co-authored-by: Eric Erhardt <eric.erhardt@microsoft.com>

src/Http/Http.Results/src/ResultsOfTHelper.cs

@@ -47,8 +47,7 @@ internal static class ResultsOfTHelper
             }
         }
 
-        // TODO: Remove IL3050 suppress when https://github.com/dotnet/linker/issues/2715 is complete.
-        [UnconditionalSuppressMessage("AOT", "IL3050", Justification = "Validated with IsDynamicCodeSupported check.")]
+        [RequiresDynamicCode("The native code for the PopulateMetadata<TTarget> instantiation might not be available at runtime.")]
         [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2060:MakeGenericMethod",
             Justification = "The call to MakeGenericMethod is safe due to the fact that  PopulateMetadata<TTarget> does not have a DynamicallyAccessMembers attribute and TTarget is annotated to preserve all methods to preserve the PopulateMetadata method.")]
         static void InvokeGenericPopulateMetadata(object[] parameters)

src/Http/Routing/src/Matching/JumpTableBuilder.cs

@@ -1,7 +1,6 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-using System.Diagnostics.CodeAnalysis;
 using System.Runtime.CompilerServices;
 using System.Text;
 
@@ -89,8 +88,6 @@ public static JumpTable Build(int defaultDestination, int exitDestination, (stri
         // Use the ILEmitTrieJumpTable if the IL is going to be compiled (not interpreted)
         return MakeILEmitTrieJumpTableIfSupported(defaultDestination, exitDestination, pathEntries, fallback);
 
-        // TODO: This suppression can be removed when https://github.com/dotnet/linker/issues/2715 is complete.
-        [UnconditionalSuppressMessage("AOT", "IL3050", Justification = "Guarded by IsDynamicCodeCompiled")]
         static JumpTable MakeILEmitTrieJumpTableIfSupported(int defaultDestination, int exitDestination, (string text, int destination)[] pathEntries, JumpTable fallback)
         {
             // ILEmitTrieJumpTable use IL emit to generate a custom, high-performance jump table.

src/Shared/PropertyHelper/PropertyHelper.cs

@@ -212,8 +212,6 @@ public static PropertyHelper[] GetVisibleProperties(
         // MakeGenericMethod + value type requires IsDynamicCodeSupported to be true.
         if (RuntimeFeature.IsDynamicCodeSupported)
         {
-            // TODO: Remove disable when https://github.com/dotnet/linker/issues/2715 is complete.
-#pragma warning disable IL3050 // Calling members annotated with 'RequiresDynamicCodeAttribute' may break functionality when AOT compiling.
             // Instance methods in the CLR can be turned into static methods where the first parameter
             // is open over "target". This parameter is always passed by reference, so we have a code
             // path for value types and a code path for reference types.
@@ -233,7 +231,6 @@ public static PropertyHelper[] GetVisibleProperties(
                     getMethod,
                     propertyGetterWrapperMethod);
             }
-#pragma warning restore IL3050 // Calling members annotated with 'RequiresDynamicCodeAttribute' may break functionality when AOT compiling.
         }
         else
         {
@@ -287,8 +284,6 @@ public static PropertyHelper[] GetVisibleProperties(
         // MakeGenericMethod + value type requires IsDynamicCodeSupported to be true.
         if (RuntimeFeature.IsDynamicCodeSupported)
         {
-            // TODO: Remove disable when https://github.com/dotnet/linker/issues/2715 is complete.
-#pragma warning disable IL3050 // Calling members annotated with 'RequiresDynamicCodeAttribute' may break functionality when AOT compiling.
             // Instance methods in the CLR can be turned into static methods where the first parameter
             // is open over "target". This parameter is always passed by reference, so we have a code
             // path for value types and a code path for reference types.
@@ -305,7 +300,6 @@ public static PropertyHelper[] GetVisibleProperties(
                     typeof(Action<object, object?>), propertySetterAsAction);
 
             return (Action<object, object?>)callPropertySetterDelegate;
-#pragma warning restore IL3050 // Calling members annotated with 'RequiresDynamicCodeAttribute' may break functionality when AOT compiling.
         }
         else
         {