Move the quotes check to JSCS.

grunt/.jshintrc

@@ -7,7 +7,6 @@
   "noarg"    : true,
   "node"     : true,
   "nonbsp"   : true,
-  "quotmark" : "single",
   "strict"   : true,
   "trailing" : true,
   "undef"    : true

js/.jscsrc

@@ -12,5 +12,6 @@
   "requireSpaceBeforeBinaryOperators": ["+", "-", "/", "*", "=", "==", "===", "!=", "!=="],
   "requireSpacesInFunctionExpression": { "beforeOpeningCurlyBrace": true },
   "validateIndentation": 2,
-  "validateLineBreaks": "LF"
+  "validateLineBreaks": "LF",
+  "validateQuoteMarks": "'"
 }

js/.jshintrc

@@ -8,6 +8,5 @@
   "eqnull"   : true,
   "expr"     : true,
   "laxbreak" : true,
-  "quotmark" : "single",
   "validthis": true
 }