Deleting a specific style name float for ie8 (#9311)

* Deleting a specific style name float for ie8

* Remove unnecessary condition

Author: Tom910

src/renderers/dom/shared/CSSPropertyOperations.js

@@ -30,7 +30,6 @@ var processStyleName = memoizeStringOnly(function(styleName) {
 });
 
 var hasShorthandPropertyBug = false;
-var styleFloatAccessor = 'cssFloat';
 if (ExecutionEnvironment.canUseDOM) {
   var tempStyle = document.createElement('div').style;
   try {
@@ -39,10 +38,6 @@ if (ExecutionEnvironment.canUseDOM) {
   } catch (e) {
     hasShorthandPropertyBug = true;
   }
-  // IE8 only supports accessing cssFloat (standard) as styleFloat
-  if (document.documentElement.style.cssFloat === undefined) {
-    styleFloatAccessor = 'styleFloat';
-  }
 }
 
 if (__DEV__) {
@@ -215,8 +210,8 @@ var CSSPropertyOperations = {
         styles[styleName],
         component,
       );
-      if (styleName === 'float' || styleName === 'cssFloat') {
-        styleName = styleFloatAccessor;
+      if (styleName === 'float') {
+        styleName = 'cssFloat';
       }
       if (styleValue) {
         style[styleName] = styleValue;