staging: rtl8188eu: remove an unused enum

The hal_intf_ps_func enum is not used. Remove it.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20210725155902.32433-5-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/include/hal_intf.h

@@ -105,11 +105,6 @@ enum hal_odm_variable {
 	HAL_ODM_WIFI_DISPLAY_STATE,
 };
 
-enum hal_intf_ps_func {
-	HAL_USB_SELECT_SUSPEND,
-	HAL_MAX_ID,
-};
-
 enum rt_eeprom_type {
 	EEPROM_93C46,
 	EEPROM_93C56,