Removing deprecated grunt-autoprefixer package

Gruntfile.js.sample

@@ -52,7 +52,6 @@ module.exports = function (grunt) {
         prod: function (component) {
             var tasks = [
                 'less',
-                'autoprefixer',
                 'cssmin',
                 'usebanner'
             ].map(function (task) {

dev/tools/grunt/configs/autoprefixer.json

@@ -1,11 +0,0 @@
-{
-  "options": {
-    "browsers": ["last 2 versions", "ie 11"]
-  },
-  "setup": {
-    "src": "<%= path.css.setup %>/setup.css"
-  },
-  "updater": {
-    "src": "<%= path.css.updater %>/updater.css"
-  }
-}

package.json.sample

@@ -11,7 +11,6 @@
   "devDependencies": {
     "glob": "~7.1.7",
     "grunt": "~1.4.1",
-    "grunt-autoprefixer": "~3.0.4",
     "grunt-banner": "~0.6.0",
     "grunt-continue": "~0.1.0",
     "grunt-contrib-clean": "~2.0.0",