Removed proxy as it was not doing anything but messing with the heroku app

Author: mgmolisani

package.json

@@ -2,7 +2,6 @@
   "name": "course-manager-app",
   "version": "0.1.0",
   "private": true,
-  "proxy": "http://localhost:8080",
   "dependencies": {
     "bootstrap": "^4.1.1",
     "font-awesome": "^4.7.0",