Remove settings search @groupId filters - since group ids can now be extension...

Remove settings search @groupId filters - since group ids can now be extension guids, and nobody uses this anyway

src/vs/workbench/parts/preferences/electron-browser/preferencesSearch.ts

@@ -106,17 +106,10 @@ export class LocalSearchProvider implements ISearchProvider {
 	}
 
 	private getGroupFilter(filter: string): IGroupFilter {
-		if (strings.startsWith(filter, '@')) {
-			const groupId = filter.replace(/^@/, '');
-			return (group: ISettingsGroup) => {
-				return group.id.toLowerCase() === groupId.toLowerCase();
-			};
-		} else {
-			const regex = strings.createRegExp(this._filter, false, { global: true });
-			return (group: ISettingsGroup) => {
-				return regex.test(group.title);
-			};
-		}
+		const regex = strings.createRegExp(this._filter, false, { global: true });
+		return (group: ISettingsGroup) => {
+			return regex.test(group.title);
+		};
 	}
 }