Add missing RemoveHandler

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70720 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/filesys.h

@@ -61,6 +61,11 @@ public:
     */
     static void AddHandler(wxFileSystemHandler* handler);
 
+    /**
+       Remove a filesystem handler from the list of handlers.
+    */
+    static wxFileSystemHandler* RemoveHandler(wxFileSystemHandler *handler);
+    
     /**
         Sets the current location. @a location parameter passed to OpenFile() is
         relative to this path.