vl: relocate paths to data directories

As an additional advantage, the logic is now unified between
POSIX and Win32 systems.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

os-win32.c

@@ -57,17 +57,6 @@ void os_setup_early_signal_handling(void)
     atexit(os_undo_timer_resolution);
 }
 
-/*
- * Look for support files in the same directory as the executable.
- *
- * The caller must use g_free() to free the returned data when it is
- * no longer required.
- */
-char *os_find_datadir(void)
-{
-    return g_strdup(qemu_get_exec_dir());
-}
-
 void os_set_line_buffering(void)
 {
     setbuf(stdout, NULL);