Remove unrelated TypeScript definitions for language model tools

Co-authored-by: bamurtaugh <25310137+bamurtaugh@users.noreply.github.com>

Author: Copilot

src/@types/vscode.proposed.chatParticipantAdditions.d.ts

@@ -265,43 +265,6 @@ declare module 'vscode' {
 		export const onDidChangeChatRequestTools: Event<ChatRequest>;
 	}
 
-	export class LanguageModelToolExtensionSource {
-		/**
-		 * ID of the extension that published the tool.
-		 */
-		readonly id: string;
-
-		/**
-		 * Label of the extension that published the tool.
-		 */
-		readonly label: string;
-
-		private constructor(id: string, label: string);
-	}
-
-	export class LanguageModelToolMCPSource {
-		/**
-		 * Editor-configured label of the MCP server that published the tool.
-		 */
-		readonly label: string;
-
-		/**
-		 * Server-defined name of the MCP server.
-		 */
-		readonly name: string;
-
-		/**
-		 * Server-defined instructions for MCP tool use.
-		 */
-		readonly instructions?: string;
-
-		private constructor(label: string, name: string, instructions?: string);
-	}
-
-	export interface LanguageModelToolInformation {
-		source: LanguageModelToolExtensionSource | LanguageModelToolMCPSource | undefined;
-	}
-
 	// TODO@API fit this into the stream
 	export interface ChatUsedContext {
 		documents: ChatDocumentContext[];