Remove some unused packages

Author: alexlafroscia

package.json

@@ -27,18 +27,15 @@
     "broccoli-asset-rev": "^2.5.0",
     "chai": "^4.1.1",
     "chai-jquery": "^2.0.0",
-    "coveralls": "^2.11.15",
     "ember-block-slots": "^1.1.11",
     "ember-cli": "^2.14.2",
     "ember-cli-chai": "^0.4.2",
-    "ember-cli-code-coverage": "^0.4.1",
     "ember-cli-dependency-checker": "^2.0.1",
     "ember-cli-document-title": "^0.3.3",
     "ember-cli-eslint": "^4.2.0",
     "ember-cli-github-pages": "0.1.2",
     "ember-cli-inject-live-reload": "^1.7.0",
     "ember-cli-mocha": "^0.14.4",
-    "ember-cli-release": "^1.0.0-beta.2",
     "ember-cli-shims": "^1.1.0",
     "ember-cli-sri": "^2.1.0",
     "ember-cli-test-loader": "^2.1.0",