rm contributors section in package.json (stick to README.md)

Author: etpinard

package.json

@@ -12,28 +12,6 @@
     "url": "https://github.com/plotly/plotly.js/issues"
   },
   "author": "Plotly Technologies Inc.",
-  "contributors": [
-    {
-      "name": "Alex Johnson",
-      "email": "alex@plot.ly",
-      "url": "http://environment.harvard.edu/about/fellows/alex-johnson"
-    },
-    {
-      "name": "Mikola Lysenko",
-      "email": "mikolalysenko@gmail.com",
-      "url": "http://0fps.net"
-    },
-    {
-      "name": "Étienne Tétreault-Pinard",
-      "email": "etienne@plot.ly",
-      "url": "https://github.com/etpinard"
-    },
-    {
-      "name": "Ben Postlethwaite",
-      "email": "ben@plot.ly",
-      "url": "http://benpostlethwaite.ca"
-    }
-  ],
   "keywords": [
     "graphing",
     "plotting",