fix(lint): leave out unused imports

Author: SabreCat

gulp/gulp-build.js

@@ -5,8 +5,8 @@ import path from 'path';
 import babel from 'gulp-babel';
 import os from 'os';
 import fs from 'fs';
-import spawn from 'cross-spawn'; // eslint-disable-line import/no-extraneous-dependencies
-import clean from 'rimraf';
+/* import spawn from 'cross-spawn'; // eslint-disable-line import/no-extraneous-dependencies
+import clean from 'rimraf'; */
 
 gulp.task('build:babel:server', () => gulp.src('website/server/**/*.js')
   .pipe(babel())