Xwayland: Do not mark decorate as experimental

libdecor support seems quite stable, no need to mark that experimental.

Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>

hw/xwayland/xwayland.c

@@ -107,7 +107,7 @@ ddxUseMsg(void)
     ErrorF("-noTouchPointerEmulation  disable touch pointer emulation\n");
     ErrorF("-force-xrandr-emulation   force non-native modes to be exposed when viewporter is not exposed by the compositor\n");
 #ifdef XWL_HAS_LIBDECOR
-    ErrorF("-decorate              add decorations to Xwayland when rootful (experimental)\n");
+    ErrorF("-decorate              add decorations to Xwayland when rootful\n");
 #endif
 }