use raw method for now to avoid event spam

src/vs/base/node/pfs.ts

@@ -11,6 +11,7 @@ import * as paths from 'vs/base/common/paths';
 import { dirname, join } from 'path';
 import { nfcall, Queue } from 'vs/base/common/async';
 import * as fs from 'fs';
+import * as os from 'os';
 import * as platform from 'vs/base/common/platform';
 import { once } from 'vs/base/common/event';
 
@@ -177,3 +178,11 @@ export function dirExists(path: string): TPromise<boolean> {
 export function fileExists(path: string): TPromise<boolean> {
 	return stat(path).then(stat => stat.isFile(), () => false);
 }
+
+/**
+ * Deletes a path from disk.
+ */
+const tmpDir = os.tmpdir();
+export function del(path: string, tmp = tmpDir): TPromise<void> {
+	return nfcall(extfs.del, path, tmp);
+}
\ No newline at end of file

src/vs/workbench/services/backup/node/backupFileService.ts

@@ -177,7 +177,7 @@ export class BackupFileService implements IBackupFileService {
 				return void 0;
 			}
 
-			return this.fileService.del(backupResource).then(() => model.remove(backupResource));
+			return pfs.del(backupResource.fsPath).then(() => model.remove(backupResource));
 		});
 	}
 
@@ -187,7 +187,7 @@ export class BackupFileService implements IBackupFileService {
 				return void 0;
 			}
 
-			return this.fileService.del(Uri.file(this.backupWorkspacePath)).then(() => model.clear());
+			return pfs.del(this.backupWorkspacePath).then(() => model.clear());
 		});
 	}
 

src/vs/workbench/services/files/node/fileService.ts

@@ -471,7 +471,7 @@ export class FileService implements IFileService {
 	public del(resource: uri): TPromise<void> {
 		const absolutePath = this.toAbsolutePath(resource);
 
-		return nfcall(extfs.del, absolutePath, this.tmpPath).then(() => {
+		return pfs.del(absolutePath, this.tmpPath).then(() => {
 
 			// Events
 			this._onAfterOperation.fire(new FileOperationEvent(resource, FileOperation.DELETE));