DevTools: remove references to fields absent in protocol.json's CSSStyle

Source/devtools/front_end/CSSStyleModel.js

Index: Source/devtools/front_end/CSSStyleModel.js
diff --git a/Source/devtools/front_end/CSSStyleModel.js b/Source/devtools/front_end/CSSStyleModel.js
index f393e5d680570b71a4b9fc96130ccd12efb1c014..8d2596b890a747e6742b19a6983a0057e54db477 100644
--- a/Source/devtools/front_end/CSSStyleModel.js
+++ b/Source/devtools/front_end/CSSStyleModel.js
@@ -731,8 +731,6 @@ WebInspector.CSSStyleDeclaration = function(cssModel, payload)
 {
     this._cssModel = cssModel;
     this.styleSheetId = payload.styleSheetId;
-    this.width = payload.width;
-    this.height = payload.height;
     this.range = payload.range ? WebInspector.TextRange.fromObject(payload.range) : null;
     this._shorthandValues = WebInspector.CSSStyleDeclaration.buildShorthandValueMap(payload.shorthandEntries);
     this._livePropertyMap = {}; // LIVE properties (source-based or style-based) : { name -> CSSProperty }