remove polyfills

client/package.json

@@ -27,7 +27,6 @@
     "eslint-scope": "3.7.1"
   },
   "dependencies": {
-    "babel-polyfill": "^6.26.0",
     "canvas-fit": "^1.5.0",
     "d3": "^4.10.0",
     "font-color-contrast": "^1.0.3",
@@ -38,7 +37,6 @@
     "mouse-position": "^2.0.1",
     "mouse-pressed": "^1.0.0",
     "orbit-camera": "^1.0.0",
-    "promise": "^7.1.1",
     "query-string": "^6.1.0",
     "react": "^16.4.2",
     "react-autocomplete": "^1.7.2",
@@ -51,8 +49,7 @@
     "redux-thunk": "^2.2.0",
     "regl": "^1.3.1",
     "scroll-speed": "^1.0.0",
-    "urijs": "^1.19.0",
-    "whatwg-fetch": "^2.0.3"
+    "urijs": "^1.19.0"
   },
   "devDependencies": {
     "autoprefixer": "^9.1.1",