Delete deprecated search provider stub

src/vs/vscode.proposed.d.ts

@@ -471,11 +471,6 @@ declare module 'vscode' {
 	}
 
 	export namespace workspace {
-		/**
-		 * DEPRECATED
-		 */
-		export function registerSearchProvider(): Disposable;
-
 		/**
 		 * Register a search provider.
 		 *

src/vs/workbench/api/node/extHost.api.impl.ts

@@ -621,10 +621,6 @@ export function createApiFactory(
 			registerFileSearchProvider: proposedApiFunction(extension, (scheme: string, provider: vscode.FileSearchProvider) => {
 				return extHostSearch.registerFileSearchProvider(scheme, provider);
 			}),
-			registerSearchProvider: proposedApiFunction(extension, () => {
-				// Temp for live share in Insiders
-				return { dispose: () => { } };
-			}),
 			registerTextSearchProvider: proposedApiFunction(extension, (scheme: string, provider: vscode.TextSearchProvider) => {
 				return extHostSearch.registerTextSearchProvider(scheme, provider);
 			}),