Remove node-fetch from package.json

Author: Aaron Caldwell

package.json

@@ -27,7 +27,6 @@
   "homepage": "https://github.com/elastic/ems-client#readme",
   "dependencies": {
     "lodash": "^4.17.15",
-    "node-fetch": "^1.7.3",
     "semver": "^6.3.0"
   },
   "devDependencies": {