Removes "winston" npm dependency: it looks we do not use it explicitely now

Author: birdofpreyru

package-lock.json

@@ -37,8 +37,7 @@
     "serialize-javascript": "^1.5.0",
     "serve-favicon": "^2.5.0",
     "shortid": "^2.2.8",
-    "url-parse": "^1.4.1",
-    "winston": "^2.4.2"
+    "url-parse": "^1.4.1"
   },
   "description": "Topcoder collection of generic ReactJS components and utils",
   "devDependencies": {