Remove moot version from bower.json

bower.json

@@ -1,7 +1,6 @@
 {
   "name": "bootstrap-switch",
   "description": "Turn checkboxes and radio buttons into toggle switches.",
-  "version": "3.3.3",
   "license": "Apache-2.0",
   "main": [
     "./dist/js/bootstrap-switch.js",