Remove "Windows only" mention from wxTE_PROCESS_ENTER documentation.

This style works for wxComboBox under GTK and OS X as well.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73869 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/combobox.h

@@ -43,8 +43,7 @@
     @style{wxTE_PROCESS_ENTER}
            The control will generate the event @c wxEVT_TEXT_ENTER
            (otherwise pressing Enter key is either processed internally by the
-           control or used for navigation between dialog controls). Windows
-           only.
+           control or used for navigation between dialog controls).
     @endStyleTable
 
     @beginEventEmissionTable{wxCommandEvent}