[dom] Optimize dom-style.js

* Remove unnecessary anonymous function, unused variables.
* Use "Number()" instead of "new Number()".

src/dom/js/dom-style.js

@@ -1,4 +1,3 @@
-(function(Y) {
 /**
  * Add style management functionality to DOM.
  * @module dom
@@ -17,9 +16,7 @@ var DOCUMENT_ELEMENT = 'documentElement',
     GET_COMPUTED_STYLE = 'getComputedStyle',
     GET_BOUNDING_CLIENT_RECT = 'getBoundingClientRect',
 
-    WINDOW = Y.config.win,
     DOCUMENT = Y.config.doc,
-    UNDEFINED = undefined,
 
     Y_DOM = Y.DOM,
 
@@ -64,7 +61,7 @@ Y.mix(Y_DOM, {
         if (style) {
             if (val === null || val === '') { // normalize unsetting
                 val = '';
-            } else if (!isNaN(new Number(val)) && re_unit.test(att)) { // number values may need a unit
+            } else if (!isNaN(Number(val)) && re_unit.test(att)) { // number values may need a unit
                 val += Y_DOM.DEFAULT_UNIT;
             }
 
@@ -148,9 +145,9 @@ Y.mix(Y_DOM, {
 });
 
 // normalize reserved word float alternatives ("cssFloat" or "styleFloat")
-if (DOCUMENT[DOCUMENT_ELEMENT][STYLE][CSS_FLOAT] !== UNDEFINED) {
+if (DOCUMENT[DOCUMENT_ELEMENT][STYLE][CSS_FLOAT] !== undefined) {
     Y_DOM.CUSTOM_STYLES[FLOAT] = CSS_FLOAT;
-} else if (DOCUMENT[DOCUMENT_ELEMENT][STYLE][STYLE_FLOAT] !== UNDEFINED) {
+} else if (DOCUMENT[DOCUMENT_ELEMENT][STYLE][STYLE_FLOAT] !== undefined) {
     Y_DOM.CUSTOM_STYLES[FLOAT] = STYLE_FLOAT;
 }
 
@@ -244,7 +241,7 @@ Y_DOM.CUSTOM_STYLES.transform = {
         style[TRANSFORM] = val;
     },
 
-    get: function(node, style) {
+    get: function(node) {
         return Y_DOM[GET_COMPUTED_STYLE](node, TRANSFORM);
     }
 };
@@ -254,10 +251,7 @@ Y_DOM.CUSTOM_STYLES.transformOrigin = {
         style[TRANSFORMORIGIN] = val;
     },
 
-    get: function(node, style) {
+    get: function(node) {
         return Y_DOM[GET_COMPUTED_STYLE](node, TRANSFORMORIGIN);
     }
 };
-
-
-})(Y);