Removed unused component from packages.json

package.json

@@ -39,7 +39,6 @@
     "leaflet-measure": "^2.0.5",
     "node-sass": "^3.10.1",
     "object.values": "^1.0.3",
-    "perfect-scrollbar": "^0.6.16",
     "proj4": "^2.4.3",
     "raw-loader": "^0.5.1",
     "react": "^15.3.2",