Remove gulp-uglify

gulpfile.js

@@ -1,13 +1,3 @@
-require('gulp')
-require('gulp-shell')
-require('gulp-concat')
-require('gulp-uglify')
-require('gulp-ext-replace')
-require('gulp-rename')
-require('gulp-istanbul')
-require('gulp-bump')
-require('gulp-tag-version')
-require('gulp-insert')
 var requireDir = require('require-dir')
 
 requireDir('./gulp/tasks')