[css-ui] Resolve Issue 37 simplify resize, depends not on overflow-x/y differences

Author: tantek

css-ui/Overview.bs

@@ -903,10 +903,6 @@ to determine the size of the element.
 The 'resize' property applies to elements
 whose computed 'overflow' value
 is something other than ''visible''.
-If 'overflow' is different in a particular axis
-(i.e. 'overflow-x' vs. 'overflow-y'),
-then this property applies to the dimension(s)
-which do not have the value ''visible''.
 
 When an element is resized by the user,
 the user agent keeps track of a resize factor