diff --git a/extensions/typescript-language-features/src/languageFeatures/copilotRelated.ts b/extensions/typescript-language-features/src/languageFeatures/copilotRelated.ts
deleted file mode 100644
index 24e4e7074e55e..0000000000000
--- a/extensions/typescript-language-features/src/languageFeatures/copilotRelated.ts
+++ /dev/null
@@ -1,97 +0,0 @@
-/*---------------------------------------------------------------------------------------------
- *  Copyright (c) Microsoft Corporation. All rights reserved.
- *  Licensed under the MIT License. See License.txt in the project root for license information.
- *--------------------------------------------------------------------------------------------*/
-
-import * as vscode from 'vscode';
-import { isSupportedLanguageMode } from '../configuration/languageIds';
-import { DocumentSelector } from '../configuration/documentSelector';
-import { API } from '../tsServer/api';
-import type * as Proto from '../tsServer/protocol/protocol';
-import { ITypeScriptServiceClient } from '../typescriptService';
-import { conditionalRegistration, requireMinVersion } from './util/dependentRegistration';
-
-const minVersion = API.v570;
-
-interface CopilotApi {
-	registerRelatedFilesProvider(providerId: {
-		extensionId: string;
-		languageId: string;
-	}, callback: (uri: vscode.Uri, context: {
-		flags: Record<string, unknown>;
-	}, cancellationToken: vscode.CancellationToken) => Promise<{
-		entries: vscode.Uri[];
-		traits?: Array<{
-			name: string;
-			value: string;
-			includeInPrompt?: boolean;
-			promptTextOverride?: string;
-		}>;
-	}>): vscode.Disposable;
-}
-
-export function register(
-	selector: DocumentSelector,
-	client: ITypeScriptServiceClient,
-): vscode.Disposable {
-	return conditionalRegistration([
-		requireMinVersion(client, minVersion),
-	], () => {
-		const ext = vscode.extensions.getExtension('github.copilot');
-		if (!ext) {
-			return new vscode.Disposable(() => { });
-		}
-
-		const disposers: vscode.Disposable[] = [];
-		ext.activate().then(() => {
-			const relatedAPI = ext.exports as CopilotApi | undefined;
-			if (relatedAPI?.registerRelatedFilesProvider) {
-				for (const syntax of selector.syntax) {
-					if (!syntax.language) {
-						continue;
-					}
-					const id = {
-						extensionId: 'vscode.typescript-language-features',
-						languageId: syntax.language
-					};
-					disposers.push(relatedAPI.registerRelatedFilesProvider(id, async (uri, _context, token) => {
-						let document;
-						try {
-							document = await vscode.workspace.openTextDocument(uri);
-						} catch {
-							if (!vscode.window.activeTextEditor) {
-								vscode.window.showErrorMessage(vscode.l10n.t("Related files provider failed. No active text editor."));
-								return { entries: [] };
-							}
-							// something is REALLY wrong if you can't open the active text editor's document, so don't catch that
-							document = await vscode.workspace.openTextDocument(vscode.window.activeTextEditor.document.uri);
-						}
-
-						if (!isSupportedLanguageMode(document)) {
-							vscode.window.showErrorMessage(vscode.l10n.t("Related files provider failed. Copilot requested file with unsupported language mode."));
-							return { entries: [] };
-						}
-
-						const file = client.toOpenTsFilePath(document);
-						if (!file) {
-							return { entries: [] };
-						}
-						const response = await client.execute('copilotRelated', { file, }, token) as Proto.CopilotRelatedResponse;
-						if (response.type !== 'response' || !response.body) {
-							return { entries: [] };
-						}
-						return { entries: response.body.relatedFiles.map(f => client.toResource(f)), traits: [] };
-					}));
-				}
-			}
-		});
-
-		return {
-			dispose: () => {
-				for (const disposer of disposers) {
-					disposer.dispose();
-				}
-			}
-		};
-	});
-}
diff --git a/extensions/typescript-language-features/src/languageProvider.ts b/extensions/typescript-language-features/src/languageProvider.ts
index 09a4fe3ccc9c6..7b95591604bd0 100644
--- a/extensions/typescript-language-features/src/languageProvider.ts
+++ b/extensions/typescript-language-features/src/languageProvider.ts
@@ -91,7 +91,6 @@ export default class LanguageProvider extends Disposable {
 			import('./languageFeatures/sourceDefinition').then(provider => this._register(provider.register(this.client, this.commandManager))),
 			import('./languageFeatures/tagClosing').then(provider => this._register(provider.register(selector, this.description, this.client))),
 			import('./languageFeatures/typeDefinitions').then(provider => this._register(provider.register(selector, this.client))),
-			import('./languageFeatures/copilotRelated').then(provider => this._register(provider.register(selector, this.client))),
 		]);
 	}
 
diff --git a/extensions/typescript-language-features/src/typescriptService.ts b/extensions/typescript-language-features/src/typescriptService.ts
index 306769f952a31..90528ee47dc8c 100644
--- a/extensions/typescript-language-features/src/typescriptService.ts
+++ b/extensions/typescript-language-features/src/typescriptService.ts
@@ -77,7 +77,6 @@ interface StandardTsServerRequests {
 	'getMoveToRefactoringFileSuggestions': [Proto.GetMoveToRefactoringFileSuggestionsRequestArgs, Proto.GetMoveToRefactoringFileSuggestions];
 	'linkedEditingRange': [Proto.FileLocationRequestArgs, Proto.LinkedEditingRangeResponse];
 	'mapCode': [Proto.MapCodeRequestArgs, Proto.MapCodeResponse];
-	'copilotRelated': [Proto.FileRequestArgs, Proto.CopilotRelatedResponse];
 	'getPasteEdits': [Proto.GetPasteEditsRequestArgs, Proto.GetPasteEditsResponse];
 	'preparePasteEdits': [Proto.PreparePasteEditsRequestArgs, Proto.PreparePasteEditsResponse];
 }