staging: r8188eu: remove unused enum hal_intf_ps_func

HAL_USB_SELECT_SUSPEND and HAL_MAX_ID are both unused,
so enum hal_intf_ps_func can be removed.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20210906190223.11396-13-straube.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/include/hal_intf.h

@@ -121,11 +121,6 @@ enum hal_odm_variable {
 	HAL_ODM_WIFI_DISPLAY_STATE,
 };
 
-enum hal_intf_ps_func {
-	HAL_USB_SELECT_SUSPEND,
-	HAL_MAX_ID,
-};
-
 typedef s32 (*c2h_id_filter)(u8 id);
 
 struct hal_ops {