This removes some functions that were listed in gtkwindow.h that didn't exist in gtkwindow.c, and it removes gtk_window_set_client_side_decorations() from gtkwindow.h and marks it static in gtkwindow.c
This removes some functions that were listed in gtkwindow.h that didn't exist in gtkwindow.c, and it removes gtk_window_ set_client_ side_decoration s() from gtkwindow.h and marks it static in gtkwindow.c