diff --git a/src/vs/workbench/api/electron-browser/mainThreadFileSystem.ts b/src/vs/workbench/api/electron-browser/mainThreadFileSystem.ts
index c4106bb3fc4649430db51cbedcb8766b29d0cf2b..e5bb035c46784d37594d8fff18413d66981a4497 100644
--- a/src/vs/workbench/api/electron-browser/mainThreadFileSystem.ts
+++ b/src/vs/workbench/api/electron-browser/mainThreadFileSystem.ts
@@ -13,8 +13,6 @@ import { Event, Emitter } from 'vs/base/common/event';
 import { extHostNamedCustomer } from 'vs/workbench/api/electron-browser/extHostCustomers';
 import { IProgress } from 'vs/platform/progress/common/progress';
 import { ISearchResultProvider, ISearchQuery, ISearchComplete, ISearchProgressItem, QueryType, IFileMatch, ISearchService, ILineMatch } from 'vs/platform/search/common/search';
-import { IWorkspaceEditingService } from 'vs/workbench/services/workspace/common/workspaceEditing';
-import { onUnexpectedError } from 'vs/base/common/errors';
 import { values } from 'vs/base/common/map';
 import { isFalsyOrEmpty } from 'vs/base/common/arrays';
 
@@ -27,8 +25,7 @@ export class MainThreadFileSystem implements MainThreadFileSystemShape {
 	constructor(
 		extHostContext: IExtHostContext,
 		@IFileService private readonly _fileService: IFileService,
-		@ISearchService private readonly _searchService: ISearchService,
-		@IWorkspaceEditingService private readonly _workspaceEditingService: IWorkspaceEditingService
+		@ISearchService private readonly _searchService: ISearchService
 	) {
 		this._proxy = extHostContext.getProxy(ExtHostContext.ExtHostFileSystem);
 	}
@@ -47,10 +44,6 @@ export class MainThreadFileSystem implements MainThreadFileSystemShape {
 		this._provider.delete(handle);
 	}
 
-	$onDidAddFileSystemRoot(data: UriComponents): void {
-		this._workspaceEditingService.addFolders([{ uri: URI.revive(data) }], true).done(null, onUnexpectedError);
-	}
-
 	$onFileSystemChange(handle: number, changes: IFileChangeDto[]): void {
 		this._provider.get(handle).$onFileSystemChange(changes);
 	}
diff --git a/src/vs/workbench/api/node/extHost.protocol.ts b/src/vs/workbench/api/node/extHost.protocol.ts
index 1c38172c0239ea910f23b6f989888a07c33e3ab5..095ea5ce4f1dd05ede93a458190ff460ebbb2352 100644
--- a/src/vs/workbench/api/node/extHost.protocol.ts
+++ b/src/vs/workbench/api/node/extHost.protocol.ts
@@ -382,7 +382,6 @@ export interface MainThreadFileSystemShape extends IDisposable {
 	$registerFileSystemProvider(handle: number, scheme: string): void;
 	$unregisterFileSystemProvider(handle: number): void;
 
-	$onDidAddFileSystemRoot(root: UriComponents): void;
 	$onFileSystemChange(handle: number, resource: IFileChangeDto[]): void;
 	$reportFileChunk(handle: number, session: number, chunk: number[] | null): void;