Remove eslint-plugin-standard

Fixes: standard/standard#1316

Author: feross

package.json

@@ -53,7 +53,6 @@
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-promise": "^4.2.1",
     "eslint-plugin-react": "^7.21.5",
-    "eslint-plugin-standard": "^4.0.2",
     "standard": "^15.0.1",
     "tape": "^5.0.1"
   },