Remove duplicate prettier.config.js settings from .eslintrc.json (#5087)

* chore: remove duplicate prettier.config.js settings from .eslintrc.json

* chore: remove unnecessary brackets now that "prettier/prettier" rule is no longer an array -- this a purely cosmetic change

Author: DoctorDerek

.eslintrc.json

@@ -12,18 +12,6 @@
     "camelcase": ["error", { "allow": ["^unstable_"] }],
     "no-unused-vars": [2, { "args": "all", "argsIgnorePattern": "^_" }],
     "no-warning-comments": 0,
-    "prettier/prettier": [
-      "error",
-      {
-        "semi": false,
-        "singleQuote": true,
-        "printWidth": 100,
-        "tabWidth": 2,
-        "useTabs": false,
-        "trailingComma": "es5",
-        "bracketSpacing": true,
-        "parser": "flow"
-      }
-    ]
+    "prettier/prettier": "error"
   }
 }