remove redundant stylelint-config-primer

Author: shawnbot

package.json

@@ -58,7 +58,6 @@
     "semver": "^5.3.0",
     "style-loader": "^0.18.2",
     "stylelint": "^7.13.0",
-    "stylelint-config-primer": "^2.0.0",
     "yo": "^2.0.0"
   }
 }