Fix bugs

Use Not(IsNull())

src/tools/clean-remote-files.ts

@@ -1,14 +1,14 @@
 import * as promiseLimit from 'promise-limit';
 import del from '../services/drive/delete-file';
 import { DriveFiles } from '../models';
-import { Not } from 'typeorm';
+import { Not, IsNull } from 'typeorm';
 import { DriveFile } from '../models/entities/drive-file';
 import { ensure } from '../prelude/ensure';
 
 const limit = promiseLimit(16);
 
 DriveFiles.find({
-	userHost: Not(null)
+	userHost: Not(IsNull())
 }).then(async files => {
 	console.log(`there is ${files.length} files`);