great copy ctor/assignment operators cleanup by Paul Cornett (patch 1307665)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@37402 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/palmos/bitmap.h

@@ -41,9 +41,6 @@ public:
     // default ctor creates an invalid bitmap, you must Create() it later
     wxBitmap() { Init(); }
 
-    // Copy constructors
-    wxBitmap(const wxBitmap& bitmap) { Init(); Ref(bitmap); }
-
     // Initialize with raw data
     wxBitmap(const char bits[], int width, int height, int depth = 1);
 
@@ -81,13 +78,6 @@ public:
     // the copy ctor but the resulting bitmap is invalid!
     wxBitmap(const wxIcon& icon) { Init(); CopyFromIcon(icon); }
 
-    wxBitmap& operator=(const wxBitmap& bitmap)
-    {
-        if ( m_refData != bitmap.m_refData )
-            Ref(bitmap);
-        return *this;
-    }
-
     wxBitmap& operator=(const wxIcon& icon)
     {
         (void)CopyFromIcon(icon);