Remove always-on language feature flag DelegateTypeNameResolutionFix

src/Compiler/Checking/NameResolution.fs

@@ -1564,7 +1564,7 @@ and private AddPartsOfTyconRefToNameEnv bulkAddMode ownDefinition (g: TcGlobals)
                         let ty = generalizedTyconRef g tcref
                         isClassTy g ty ||
                         isStructTy g ty ||
-                        (g.langVersion.SupportsFeature LanguageFeature.DelegateTypeNameResolutionFix && isDelegateTy g ty))
+                        isDelegateTy g ty)
 
             if mayHaveConstruction then
                 tab.AddOrModify (tcref.DisplayName, (fun prev ->

src/Compiler/FSComp.txt

@@ -1252,7 +1252,6 @@ featureIndexerNotationWithoutDot,"expr[idx] notation for indexing and slicing"
 featureRefCellNotationInformationals,"informational messages related to reference cells"
 featureNonVariablePatternsToRightOfAsPatterns,"non-variable patterns to the right of 'as' patterns"
 featureAttributesToRightOfModuleKeyword,"attributes to the right of the 'module' keyword"
-featureDelegateTypeNameResolutionFix,"fix to resolution of delegate type names, see https://github.com/dotnet/fsharp/issues/10228"
 3090,tcIfThenElseMayNotBeUsedWithinQueries,"An if/then/else expression may not be used within queries. Consider using either an if/then expression, or use a sequence expression instead."
 3091,ilxgenUnexpectedArgumentToMethodHandleOfDuringCodegen,"Invalid argument to 'methodhandleof' during codegen"
 3092,etProvidedTypeReferenceMissingArgument,"A reference to a provided type was missing a value for the static parameter '%s'. You may need to recompile one or more referenced assemblies."

src/Compiler/Facilities/LanguageFeatures.fs

@@ -34,7 +34,6 @@ type LanguageFeature =
     | UnionIsPropertiesVisible
     | NonVariablePatternsToRightOfAsPatterns
     | AttributesToRightOfModuleKeyword
-    | DelegateTypeNameResolutionFix
     | ReallyLongLists
     | ErrorOnDeprecatedRequireQualifiedAccess
     | RequiredPropertiesSupport
@@ -154,7 +153,6 @@ type LanguageVersion(versionText, ?disabledFeaturesArray: LanguageFeature array)
                 LanguageFeature.RefCellNotationInformationals, languageVersion60
                 LanguageFeature.NonVariablePatternsToRightOfAsPatterns, languageVersion60
                 LanguageFeature.AttributesToRightOfModuleKeyword, languageVersion60
-                LanguageFeature.DelegateTypeNameResolutionFix, languageVersion60
 
                 // F# 7.0
                 LanguageFeature.ReallyLongLists, languageVersion70
@@ -351,7 +349,6 @@ type LanguageVersion(versionText, ?disabledFeaturesArray: LanguageFeature array)
         | LanguageFeature.UnionIsPropertiesVisible -> FSComp.SR.featureUnionIsPropertiesVisible ()
         | LanguageFeature.NonVariablePatternsToRightOfAsPatterns -> FSComp.SR.featureNonVariablePatternsToRightOfAsPatterns ()
         | LanguageFeature.AttributesToRightOfModuleKeyword -> FSComp.SR.featureAttributesToRightOfModuleKeyword ()
-        | LanguageFeature.DelegateTypeNameResolutionFix -> FSComp.SR.featureDelegateTypeNameResolutionFix ()
         | LanguageFeature.ReallyLongLists -> FSComp.SR.featureReallyLongList ()
         | LanguageFeature.ErrorOnDeprecatedRequireQualifiedAccess -> FSComp.SR.featureErrorOnDeprecatedRequireQualifiedAccess ()
         | LanguageFeature.RequiredPropertiesSupport -> FSComp.SR.featureRequiredProperties ()

src/Compiler/Facilities/LanguageFeatures.fsi

@@ -24,7 +24,6 @@ type LanguageFeature =
     | UnionIsPropertiesVisible
     | NonVariablePatternsToRightOfAsPatterns
     | AttributesToRightOfModuleKeyword
-    | DelegateTypeNameResolutionFix
     | ReallyLongLists
     | ErrorOnDeprecatedRequireQualifiedAccess
     | RequiredPropertiesSupport