Revert "optimize jpg with jpegoptim"

This reverts commit e389e08841.

gulpfile.babel.js

@@ -9,7 +9,6 @@ import browser           from 'browser-sync'
 import autoprefixer from 'autoprefixer'
 import cssnano      from 'cssnano'
 import critical     from 'critical'
-import imageminJpegoptim from 'imagemin-jpegoptim'
 
 // load plugins
 const $ = plugins()
@@ -253,7 +252,7 @@ export const icons = () => src(iconset.icons)
 //
 const imageminPlugins = [
     $.imagemin.gifsicle({ interlaced: true }),
-    imageminJpegoptim(),
+    $.imagemin.jpegtran(),
     $.imagemin.optipng({ optimizationLevel: 5 }),
     $.imagemin.svgo({ plugins: [{removeViewBox: false }]})
 ]

package.json

@@ -53,8 +53,7 @@
     "gulp-stylus": ">=2.3.1",
     "gulp-svg-sprite": ">=1.2.2",
     "gulp-uglify": ">=1.2.0",
-    "gulp-util": ">=3.0.6",
-    "imagemin-jpegoptim": ">=5.0.0"
+    "gulp-util": ">=3.0.6"
   },
   "engines": {
     "node": ">=5.0.0"