Remove superfluous xo rules

Author: wooorm

index.js

@@ -6,6 +6,7 @@ var sh = 'X'
 var th = '0'
 
 // Get the phonetics according to the original Metaphone algorithm from a value
+// eslint-disable-next-line complexity
 function metaphone(value) {
   var phonized = ''
   var index = 0

package.json

@@ -54,9 +54,6 @@
   "xo": {
     "prettier": true,
     "esnext": false,
-    "rules": {
-      "complexity": "off"
-    },
     "ignore": [
       "metaphone.js"
     ]