Remove js:next field from package.json

Author: Brandon Dail

package.json

@@ -2,7 +2,6 @@
   "name": "tinytime",
   "version": "0.2.6",
   "amdName": "tinytime",
-  "jsnext:main": "src/index.js",
   "main": "dist/tinytime.js",
   "umd:main": "dist/tinytime.umd.js",
   "license": "MIT",