Remove unused related files code (#8733)

Author: akhera99

src/lsptoolshost/activate.ts

@@ -27,7 +27,6 @@ import { TelemetryEventNames } from '../shared/telemetryEventNames';
 import { WorkspaceStatus } from './workspace/workspaceStatus';
 import { ProjectContextStatus } from './projectContext/projectContextStatus';
 import { RoslynLanguageServer } from './server/roslynLanguageServer';
-import { registerCopilotRelatedFilesProvider } from './copilot/relatedFilesProvider';
 import { registerCopilotContextProviders } from './copilot/contextProviders';
 import { RazorLogger } from '../razor/src/razorLogger';
 import { registerRazorEndpoints } from './razor/razorEndpoints';
@@ -79,7 +78,6 @@ export async function activateRoslynLanguageServer(
 
     registerLanguageStatusItems(context, languageServer, languageServerEvents);
     registerMiscellaneousFileNotifier(context, languageServer);
-    registerCopilotRelatedFilesProvider(context, languageServer, _channel);
     registerCopilotContextProviders(context, languageServer, _channel);
 
     // Register any commands that need to be handled by the extension.

src/lsptoolshost/copilot/relatedFilesProvider.ts

@@ -239,15 +239,6 @@ export interface ProjectNeedsRestoreName {
     projectFilePaths: string[];
 }
 
-export interface CopilotRelatedDocumentsParams extends WorkDoneProgressParams, PartialResultParams {
-    _vs_textDocument: TextDocumentIdentifier;
-    position: Position;
-}
-
-export interface CopilotRelatedDocumentsReport {
-    _vs_file_paths?: string[];
-}
-
 export interface SourceGeneratorGetRequestParams {
     textDocument: TextDocumentIdentifier;
     resultId?: string;
@@ -366,18 +357,6 @@ export namespace ProjectNeedsRestoreRequest {
     export const type = new RequestType<ProjectNeedsRestoreName, void, void>(method);
 }
 
-export namespace CopilotRelatedDocumentsRequest {
-    export const method = 'copilot/_related_documents';
-    export const messageDirection: MessageDirection = MessageDirection.clientToServer;
-    export const type = new ProtocolRequestType<
-        CopilotRelatedDocumentsParams,
-        CopilotRelatedDocumentsReport[],
-        CopilotRelatedDocumentsReport[],
-        void,
-        void
-    >(method);
-}
-
 export namespace SourceGeneratorGetTextRequest {
     export const method = 'sourceGeneratedDocument/_roslyn_getText';
     export const messageDirection: MessageDirection = MessageDirection.clientToServer;