Remove duplicate license field from package.json

Author: ndhoule

package.json

@@ -2,7 +2,6 @@
   "name": "@segment/load-script",
   "description": "Dynamically and asynchronously load a script file.",
   "version": "1.0.0-pre.1",
-  "license": "MIT",
   "keywords": [
     "DOM",
     "iframe",