pinctrl: renesas: Drop unused members from struct sh_pfc_pinctrl

Drop unused members from struct sh_pfc_pinctrl.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>

drivers/pinctrl/renesas/pfc.c

@@ -50,10 +50,6 @@ struct sh_pfc_pinctrl {
 	struct sh_pfc *pfc;
 
 	struct sh_pfc_pin_config *configs;
-
-	const char *func_prop_name;
-	const char *groups_prop_name;
-	const char *pins_prop_name;
 };
 
 struct sh_pfc_pin_range {