Remove documentation notes to OS X prior 10.5.

Since these prior versions are not supported by the cocoa or carbon builds these notes are no longer required in the documentation.

interface/wx/srchctrl.h

@@ -120,8 +120,6 @@ public:
         Returns the search button visibility value.
         If there is a menu attached, the search button will be visible regardless of
         the search button visibility value.
-
-        This always returns @false in Mac OS X v10.3
     */
     virtual bool IsSearchButtonVisible() const;
 
@@ -148,8 +146,6 @@ public:
         Sets the search button visibility value on the search control.
         If there is a menu attached, the search button will be visible regardless of
         the search button visibility value.
-
-        This has no effect in Mac OS X v10.3
     */
     virtual void ShowSearchButton(bool show);
 

interface/wx/sysopt.h

@@ -118,7 +118,6 @@
         Tells wxListCtrl to use the generic control even when it is capable of
         using the native control instead. Also known as wxMAC_ALWAYS_USE_GENERIC_LISTCTRL.
     @flag{mac.textcontrol-use-spell-checker}
-        This option only has effect for Mac OS X 10.4 and higher.
         If 1 activates the spell checking in wxTextCtrl.
     @flag{osx.openfiledialog.always-show-types}
         Per default a wxFileDialog with wxFD_OPEN does not show a types-popup on OS X but allows