Remove obsolete ember-cli-shims dependency

Author: Turbo87

package-lock.json

@@ -43,7 +43,6 @@
     "ember-cli-moment-shim": "^3.5.0",
     "ember-cli-qunit": "^4.3.2",
     "ember-cli-sass": "^7.1.7",
-    "ember-cli-shims": "^1.2.0",
     "ember-cli-sri": "2.1.1",
     "ember-cli-template-lint": "^0.7.0",
     "ember-cli-uglify": "^2.0.0",