Revert ember-cli-eslint

Author: xg-wang

package.json

@@ -40,7 +40,6 @@
     "co": "^4.6.0",
     "ember-cli": "~3.5.1",
     "ember-cli-dependency-checker": "^3.0.0",
-    "ember-cli-eslint": "^4.2.1",
     "ember-cli-fastboot": "^2.0.0",
     "ember-cli-htmlbars": "^3.0.1",
     "ember-cli-inject-live-reload": "^2.0.1",