diff --git a/docs/workflow/trimming/feature-switches.md b/docs/workflow/trimming/feature-switches.md
index 76714d95f2c2ba..667d08a3f457c1 100644
--- a/docs/workflow/trimming/feature-switches.md
+++ b/docs/workflow/trimming/feature-switches.md
@@ -12,7 +12,6 @@ configurations but their defaults might vary as any SDK can set the defaults dif
| DynamicCodeSupport | System.Runtime.CompilerServices.RuntimeFeature.IsDynamicCodeSupported | Changes RuntimeFeature.IsDynamicCodeSupported to false to allow testing AOT-safe fallback code without publishing for Native AOT. |
| EnableGeneratedComInterfaceComImportInterop | System.Runtime.InteropServices.Marshalling.EnableGeneratedComInterfaceComImportInterop | When set to true, enables casting source-generated COM object wrappers to built-in COM-based COM interfaces. |
| VerifyDependencyInjectionOpenGenericServiceTrimmability | Microsoft.Extensions.DependencyInjection.VerifyOpenGenericServiceTrimmability | When set to true, DependencyInjection will verify trimming annotations applied to open generic services are correct. |
-| _AggressiveAttributeTrimming | System.AggressiveAttributeTrimming | When set to true, aggressively trims attributes to allow for the most size savings possible, even if it could result in runtime behavior changes |
| _ComObjectDescriptorSupport | System.ComponentModel.TypeDescriptor.IsComObjectDescriptorSupported | When set to true, supports creating a TypeDescriptor based view of COM objects. |
| _DataSetXmlSerializationSupport | System.Data.DataSet.XmlSerializationIsSupported | When set to false, DataSet implementation of IXmlSerializable will throw instead of using trim-incompatible XML serialization. |
| _DefaultValueAttributeSupport | System.ComponentModel.DefaultValueAttribute.IsSupported | When set to true, supports creating a DefaultValueAttribute at runtime. |
diff --git a/src/coreclr/nativeaot/System.Private.CoreLib/src/ILLink/ILLink.LinkAttributes.xml b/src/coreclr/nativeaot/System.Private.CoreLib/src/ILLink/ILLink.LinkAttributes.xml
index d2691fa8803934..a82594ff868e25 100644
--- a/src/coreclr/nativeaot/System.Private.CoreLib/src/ILLink/ILLink.LinkAttributes.xml
+++ b/src/coreclr/nativeaot/System.Private.CoreLib/src/ILLink/ILLink.LinkAttributes.xml
@@ -20,17 +20,4 @@
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diff --git a/src/libraries/System.Private.CoreLib/src/ILLink/ILLink.LinkAttributes.Shared.xml b/src/libraries/System.Private.CoreLib/src/ILLink/ILLink.LinkAttributes.Shared.xml
index db98894014bc5c..ca7f802dc2add2 100644
--- a/src/libraries/System.Private.CoreLib/src/ILLink/ILLink.LinkAttributes.Shared.xml
+++ b/src/libraries/System.Private.CoreLib/src/ILLink/ILLink.LinkAttributes.Shared.xml
@@ -85,267 +85,4 @@
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- Serviceable
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- PreferInbox
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- RepositoryUrl
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- SourceCommitUrl
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- CommitHash
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- IsTrimmable
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diff --git a/src/libraries/System.Runtime/tests/System.Runtime.Tests/TrimmingTests/AggressiveAttributeTrimmingTest.cs b/src/libraries/System.Runtime/tests/System.Runtime.Tests/TrimmingTests/AggressiveAttributeTrimmingTest.cs
deleted file mode 100644
index dfdce520e1904d..00000000000000
--- a/src/libraries/System.Runtime/tests/System.Runtime.Tests/TrimmingTests/AggressiveAttributeTrimmingTest.cs
+++ /dev/null
@@ -1,80 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-
-#nullable enable
-
-using System;
-using System.Diagnostics.CodeAnalysis;
-using System.Runtime.CompilerServices;
-using System.Reflection;
-
-///
-/// Ensures setting _AggressiveAttributeTrimming = true causes various attributes to be trimmed
-///
-class Program
-{
- [UnconditionalSuppressMessage ("ReflectionAnalysis", "IL2111", Justification = "Expected trim warning for reflection over annotated members.")]
- [UnconditionalSuppressMessage ("ReflectionAnalysis", "IL2026", Justification = "Expected trim warning for reflection over annotated members.")]
- static int Main(string[] args)
- {
- // Reference to IsDynamicCodeSupported (which has FeatureGuard(typeof(RequiresDynamicCodeAttribute)))
- // should not produce a warning because both RequiresDynamicCodeAttribute and FeatureGuardAttribute are removed.
- if (RuntimeFeature.IsDynamicCodeSupported)
- {
- UseDynamicCode();
- }
-
- // Check that a few attribute instances are indeed removed
- CheckRemovedAttributes(typeof(MembersWithRemovedAttributes));
-
- return 100;
- }
-
- [RequiresDynamicCode(nameof(UseDynamicCode))]
- static void UseDynamicCode() { }
-
- class MembersWithRemovedAttributes
- {
- static void DynamicallyAccessedMembers([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicMethods)] Type t) { }
-
- [FeatureGuard(typeof(RequiresUnreferencedCodeAttribute))]
- static bool FeatureGuard => throw null!;
-
- [FeatureSwitchDefinition("Program.MembersWithRemovedAttributes.FeatureSwitchDefinition")]
- static bool FeatureSwitchDefinition => throw null!;
-
- [RequiresDynamicCode(nameof(RequiresDynamicCode))]
- static void RequiresDynamicCode() { }
-
- [RequiresUnreferencedCode(nameof(RequiresUnreferencedCode))]
- static void RequiresUnreferencedCode() { }
- }
-
- static void CheckRemovedAttributes([DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.All)] Type type)
- {
- Console.WriteLine($"Validating {type}");
- foreach (var member in type.GetMembers(BindingFlags.Static | BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.DeclaredOnly))
- {
- CheckRemovedAttributes(member);
-
- if (member is MethodInfo method)
- {
- foreach (var parameter in method.GetParameters())
- {
- CheckRemovedAttributes(parameter);
- }
- }
- }
- }
-
- static void CheckRemovedAttributes(ICustomAttributeProvider provider)
- {
- foreach (var attribute in provider.GetCustomAttributes(false))
- {
- if (attribute is NullableContextAttribute)
- continue;
-
- throw new Exception($"Unexpected attribute {attribute.GetType()} on {provider}");
- }
- }
-}
diff --git a/src/libraries/System.Runtime/tests/System.Runtime.Tests/TrimmingTests/System.Runtime.TrimmingTests.proj b/src/libraries/System.Runtime/tests/System.Runtime.Tests/TrimmingTests/System.Runtime.TrimmingTests.proj
index ac7ab0c60226b8..7976b3a89c221d 100644
--- a/src/libraries/System.Runtime/tests/System.Runtime.Tests/TrimmingTests/System.Runtime.TrimmingTests.proj
+++ b/src/libraries/System.Runtime/tests/System.Runtime.Tests/TrimmingTests/System.Runtime.TrimmingTests.proj
@@ -2,10 +2,6 @@
-
- _AggressiveAttributeTrimming
- SuppressTrimAnalysisWarnings;TrimmerSingleWarn
-
osx-x64;linux-x64;browser-wasm
diff --git a/src/mono/System.Private.CoreLib/System.Private.CoreLib.csproj b/src/mono/System.Private.CoreLib/System.Private.CoreLib.csproj
index 8f6fbf18070cd1..36877bc84b33cd 100644
--- a/src/mono/System.Private.CoreLib/System.Private.CoreLib.csproj
+++ b/src/mono/System.Private.CoreLib/System.Private.CoreLib.csproj
@@ -142,9 +142,6 @@
-
-
-
diff --git a/src/mono/System.Private.CoreLib/src/ILLink/ILLink.LinkAttributes.xml b/src/mono/System.Private.CoreLib/src/ILLink/ILLink.LinkAttributes.xml
deleted file mode 100644
index 90bb636cc6e5a6..00000000000000
--- a/src/mono/System.Private.CoreLib/src/ILLink/ILLink.LinkAttributes.xml
+++ /dev/null
@@ -1,16 +0,0 @@
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