Remove ember-cli-update as a dependancy

Author: himynameisjonas

package.json

@@ -44,7 +44,6 @@
     "ember-cli-sri": "^2.1.1",
     "ember-cli-template-lint": "^1.0.0-beta.1",
     "ember-cli-uglify": "^2.1.0",
-    "ember-cli-update": "^0.34.4",
     "ember-disable-prototype-extensions": "^1.1.3",
     "ember-export-application-global": "^2.0.0",
     "ember-load-initializers": "^1.1.0",