Remove eslint-plugin-standard

standard 16.0.0 and eslint-config-standard 16.0.0 no longer require the
eslint-plugin-standard package.

[1] standard/standard#1316

package.json

@@ -24,7 +24,6 @@
     "eslint-plugin-import": "2",
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-promise": "^6.0.0",
-    "eslint-plugin-standard": "^5.0.0",
     "form-data": "^4.0.0",
     "globby": "^10",
     "lerna": "^5.1.8",

yarn.lock

@@ -3458,11 +3458,6 @@ eslint-plugin-react@^7.28.0:
     semver "^6.3.0"
     string.prototype.matchall "^4.0.7"
 
-eslint-plugin-standard@^5.0.0:
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/eslint-plugin-standard/-/eslint-plugin-standard-5.0.0.tgz#c43f6925d669f177db46f095ea30be95476b1ee4"
-  integrity sha512-eSIXPc9wBM4BrniMzJRBm2uoVuXz2EPa+NXPk2+itrVt+r5SbKFERx/IgrK/HmfjddyKVz2f+j+7gBRvu19xLg==
-
 eslint-plugin-unicorn@^36.0.0:
   version "36.0.0"
   resolved "https://registry.yarnpkg.com/eslint-plugin-unicorn/-/eslint-plugin-unicorn-36.0.0.tgz#db50e1426839e401d33c5a279f49d4a5bbb640d8"