Remove @ndhoule/defaults package

Author: Bryan Mikaelian

package.json

@@ -29,7 +29,6 @@
   },
   "homepage": "https://github.com/segmentio/analytics.js-core#readme",
   "dependencies": {
-    "@ndhoule/defaults": "^2.0.1",
     "@ndhoule/extend": "^2.0.0",
     "@ndhoule/foldl": "^2.0.1",
     "@ndhoule/includes": "^2.0.1",