Move AllowByRefLike to SRMExtensions.

ICSharpCode.Decompiler/Disassembler/ReflectionDisassembler.cs

@@ -1734,7 +1734,7 @@ namespace ICSharpCode.Decompiler.Disassembler
 					{
 						output.Write("valuetype ");
 					}
-					if ((gp.Attributes & TypeUtils.AllowByRefLike) == TypeUtils.AllowByRefLike)
+					if ((gp.Attributes & SRMExtensions.AllowByRefLike) == SRMExtensions.AllowByRefLike)
 					{
 						output.Write("byreflike ");
 					}

ICSharpCode.Decompiler/SRMHacks.cs

@@ -14,6 +14,8 @@ namespace ICSharpCode.Decompiler
 {
 	public static partial class SRMExtensions
 	{
+		internal const GenericParameterAttributes AllowByRefLike = (GenericParameterAttributes)0x0020;
+
 		public static ImmutableArray<MethodImplementationHandle> GetMethodImplementations(
 			this MethodDefinitionHandle handle, MetadataReader reader)
 		{

ICSharpCode.Decompiler/TypeSystem/Implementation/MetadataTypeParameter.cs

@@ -119,7 +119,7 @@ namespace ICSharpCode.Decompiler.TypeSystem.Implementation
 		public override bool HasDefaultConstructorConstraint => (attr & GenericParameterAttributes.DefaultConstructorConstraint) != 0;
 		public override bool HasReferenceTypeConstraint => (attr & GenericParameterAttributes.ReferenceTypeConstraint) != 0;
 		public override bool HasValueTypeConstraint => (attr & GenericParameterAttributes.NotNullableValueTypeConstraint) != 0;
-		public override bool AllowsRefLikeType => (attr & TypeUtils.AllowByRefLike) != 0;
+		public override bool AllowsRefLikeType => (attr & SRMExtensions.AllowByRefLike) != 0;
 
 		public override bool HasUnmanagedConstraint {
 			get {

ICSharpCode.Decompiler/TypeSystem/TypeUtils.cs

@@ -27,8 +27,6 @@ namespace ICSharpCode.Decompiler.TypeSystem
 	{
 		public const int NativeIntSize = 6; // between 4 (Int32) and 8 (Int64)
 
-		public const GenericParameterAttributes AllowByRefLike = (GenericParameterAttributes)0x0020;
-
 		/// <summary>
 		/// Gets the size (in bytes) of the input type.
 		/// Returns <c>NativeIntSize</c> for pointer-sized types.