Remove `IDispatchImplAttribute` API (#76416)

* Remove IDispatchImplAttribute API

This type has never been supported on .NET Core.
Removing all supporting code paths.

7 files changed, 0 insertions, 64 deletions

diff --git a/src/libraries/System.Reflection.Metadata/tests/Resources/Interop/Interop.Mock01.cs b/src/libraries/System.Reflection.Metadata/tests/Resources/Interop/Interop.Mock01.cs
index 0ad8ac99a04..ef6ab5b7f20 100644
--- a/src/libraries/System.Reflection.Metadata/tests/Resources/Interop/Interop.Mock01.cs
+++ b/src/libraries/System.Reflection.Metadata/tests/Resources/Interop/Interop.Mock01.cs
@@ -17,7 +17,6 @@ using System.Runtime.InteropServices;
 [assembly: ComVisible(true)] // not embed
 [assembly: TypeLibVersion(1, 0)] // not embed
 // [assembly: SetWin32ContextInIDispatch()]
-// [assembly: IDispatchImpl(IDispatchImplType.CompatibleImpl)] // not embed
 
 namespace MockInterop01
 {
diff --git a/src/libraries/System.Runtime.InteropServices/src/MatchingRefApiCompatBaseline.txt b/src/libraries/System.Runtime.InteropServices/src/MatchingRefApiCompatBaseline.txt
index dd2e06b69c3..adf9d5b07e0 100644
--- a/src/libraries/System.Runtime.InteropServices/src/MatchingRefApiCompatBaseline.txt
+++ b/src/libraries/System.Runtime.InteropServices/src/MatchingRefApiCompatBaseline.txt
@@ -2,8 +2,6 @@ Compat issues with assembly System.Runtime.InteropServices:
 TypesMustExist : Type 'System.Runtime.InteropServices.AssemblyRegistrationFlags' does not exist in the reference but it does exist in the implementation.
 CannotChangeAttribute : Attribute 'System.Runtime.Versioning.UnsupportedOSPlatformAttribute' on 'System.Runtime.InteropServices.ComWrappers' changed from '[UnsupportedOSPlatformAttribute("android")]' in the implementation to '[UnsupportedOSPlatformAttribute("android")]' in the reference.
 TypesMustExist : Type 'System.Runtime.InteropServices.ExporterEventKind' does not exist in the reference but it does exist in the implementation.
-TypesMustExist : Type 'System.Runtime.InteropServices.IDispatchImplAttribute' does not exist in the reference but it does exist in the implementation.
-TypesMustExist : Type 'System.Runtime.InteropServices.IDispatchImplType' does not exist in the reference but it does exist in the implementation.
 TypesMustExist : Type 'System.Runtime.InteropServices.RegistrationClassContext' does not exist in the reference but it does exist in the implementation.
 TypesMustExist : Type 'System.Runtime.InteropServices.RegistrationConnectionType' does not exist in the reference but it does exist in the implementation.
 TypesMustExist : Type 'System.Runtime.InteropServices.SetWin32ContextInIDispatchAttribute' does not exist in the reference but it does exist in the implementation.
diff --git a/src/libraries/System.Runtime.InteropServices/src/System.Runtime.InteropServices.csproj b/src/libraries/System.Runtime.InteropServices/src/System.Runtime.InteropServices.csproj
index fc2048c219a..99e288f8de5 100644
--- a/src/libraries/System.Runtime.InteropServices/src/System.Runtime.InteropServices.csproj
+++ b/src/libraries/System.Runtime.InteropServices/src/System.Runtime.InteropServices.csproj
@@ -29,8 +29,6 @@
     <Compile Include="System\Runtime\InteropServices\ComUnregisterFunctionAttribute.cs" />
     <Compile Include="System\Runtime\InteropServices\ExporterEventKind.cs" />
     <Compile Include="System\Runtime\InteropServices\HandleCollector.cs" />
-    <Compile Include="System\Runtime\InteropServices\IDispatchImplAttribute.cs" />
-    <Compile Include="System\Runtime\InteropServices\IDispatchImplType.cs" />
     <Compile Include="System\Runtime\InteropServices\ImportedFromTypeLibAttribute.cs" />
     <Compile Include="System\Runtime\InteropServices\ManagedToNativeComInteropStubAttribute.cs" />
     <Compile Include="System\Runtime\InteropServices\PrimaryInteropAssemblyAttribute.cs" />
diff --git a/src/libraries/System.Runtime.InteropServices/src/System/Runtime/InteropServices/IDispatchImplAttribute.cs b/src/libraries/System.Runtime.InteropServices/src/System/Runtime/InteropServices/IDispatchImplAttribute.cs
deleted file mode 100644
index dfe2ad08ddb..00000000000
--- a/src/libraries/System.Runtime.InteropServices/src/System/Runtime/InteropServices/IDispatchImplAttribute.cs
+++ /dev/null
@@ -1,18 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-
-namespace System.Runtime.InteropServices
-{
-    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Assembly, Inherited = false)]
-    [Obsolete("IDispatchImplAttribute has been deprecated and is not supported.")]
-    public sealed class IDispatchImplAttribute : Attribute
-    {
-        public IDispatchImplAttribute(short implType) : this((IDispatchImplType)implType)
-        {
-        }
-
-        public IDispatchImplAttribute(IDispatchImplType implType) => Value = implType;
-
-        public IDispatchImplType Value { get; }
-    }
-}
diff --git a/src/libraries/System.Runtime.InteropServices/src/System/Runtime/InteropServices/IDispatchImplType.cs b/src/libraries/System.Runtime.InteropServices/src/System/Runtime/InteropServices/IDispatchImplType.cs
deleted file mode 100644
index fe674c3954c..00000000000
--- a/src/libraries/System.Runtime.InteropServices/src/System/Runtime/InteropServices/IDispatchImplType.cs
+++ /dev/null
@@ -1,13 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-
-namespace System.Runtime.InteropServices
-{
-    [Obsolete("IDispatchImplAttribute and IDispatchImplType have been deprecated and are not supported.")]
-    public enum IDispatchImplType
-    {
-        CompatibleImpl = 2,
-        InternalImpl = 1,
-        SystemDefinedImpl = 0,
-    }
-}
diff --git a/src/libraries/System.Runtime.InteropServices/tests/System.Runtime.InteropServices.UnitTests/System.Runtime.InteropServices.Tests.csproj b/src/libraries/System.Runtime.InteropServices/tests/System.Runtime.InteropServices.UnitTests/System.Runtime.InteropServices.Tests.csproj
index 34964fb33f2..867c373eea2 100644
--- a/src/libraries/System.Runtime.InteropServices/tests/System.Runtime.InteropServices.UnitTests/System.Runtime.InteropServices.Tests.csproj
+++ b/src/libraries/System.Runtime.InteropServices/tests/System.Runtime.InteropServices.UnitTests/System.Runtime.InteropServices.Tests.csproj
@@ -44,7 +44,6 @@
     <Compile Include="System\Runtime\InteropServices\GuidAttributeTests.cs" />
     <Compile Include="System\Runtime\InteropServices\HandleCollectorTests.cs" />
     <Compile Include="System\Runtime\InteropServices\HandleRefTests.cs" />
-    <Compile Include="System\Runtime\InteropServices\IDispatchImplAttributeTests.cs" />
     <Compile Include="System\Runtime\InteropServices\InterfaceTypeAttributeTests.cs" />
     <Compile Include="System\Runtime\InteropServices\LCIDConversionAttributeTests.cs" />
     <Compile Include="System\Runtime\InteropServices\LibraryImportAttributeTests.cs" />
diff --git a/src/libraries/System.Runtime.InteropServices/tests/System.Runtime.InteropServices.UnitTests/System/Runtime/InteropServices/IDispatchImplAttributeTests.cs b/src/libraries/System.Runtime.InteropServices/tests/System.Runtime.InteropServices.UnitTests/System/Runtime/InteropServices/IDispatchImplAttributeTests.cs
deleted file mode 100644
index ac192126f64..00000000000
--- a/src/libraries/System.Runtime.InteropServices/tests/System.Runtime.InteropServices.UnitTests/System/Runtime/InteropServices/IDispatchImplAttributeTests.cs
+++ /dev/null
@@ -1,27 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-
-using System.Reflection;
-using Xunit;
-
-namespace System.Runtime.InteropServices.Tests
-{
-    public class IDispatchImplAttributeTests
-    {
-        [Theory]
-        [InlineData(-1)]
-        [InlineData(0)]
-        [InlineData(2)]
-        public void Ctor_ImplTypeShort(short implType)
-        {
-            Type type = Type.GetType("System.Runtime.InteropServices.IDispatchImplAttribute, System.Runtime.InteropServices");
-            PropertyInfo valueProperty = type.GetProperty("Value");
-            Assert.NotNull(type);
-            Assert.NotNull(valueProperty);
-
-            ConstructorInfo shortConstructor = type.GetConstructor(new Type[] { typeof(short) });
-            object attribute = shortConstructor.Invoke(new object[] { implType });
-            Assert.Equal(implType, (int)valueProperty.GetValue(attribute));
-        }
-    }
-}