staging: rtl8188eu: remove unused {en,dis}able_interrupt

rtw_hal_enable_interrupt() and rtw_hal_disable_interrupt() are never
referenced, so remove them.

They used to be the only place where the enable_interrupt() and
disable_interrupt() callbacks were called, and the function pointer
is never set, so get rid of the function pointer as well.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Cc: Greg Kroah-Hartman <gregkh@linux.com>
Cc: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/hal/hal_intf.c

@@ -156,22 +156,6 @@ void rtw_hal_set_odm_var(struct adapter *adapt,
 						      val1, set);
 }
 
-void rtw_hal_enable_interrupt(struct adapter *adapt)
-{
-	if (adapt->HalFunc.enable_interrupt)
-		adapt->HalFunc.enable_interrupt(adapt);
-	else
-		DBG_88E("%s: HalFunc.enable_interrupt is NULL!\n", __func__);
-}
-
-void rtw_hal_disable_interrupt(struct adapter *adapt)
-{
-	if (adapt->HalFunc.disable_interrupt)
-		adapt->HalFunc.disable_interrupt(adapt);
-	else
-		DBG_88E("%s: HalFunc.disable_interrupt is NULL!\n", __func__);
-}
-
 u32 rtw_hal_inirp_init(struct adapter *adapt)
 {
 	u32 rst = _FAIL;

drivers/staging/rtl8188eu/include/hal_intf.h

@@ -171,8 +171,6 @@ struct hal_ops {
 
 	void	(*read_adapter_info)(struct adapter *padapter);
 
-	void	(*enable_interrupt)(struct adapter *padapter);
-	void	(*disable_interrupt)(struct adapter *padapter);
 	s32	(*interrupt_handler)(struct adapter *padapter);
 
 	void	(*set_bwmode_handler)(struct adapter *padapter,
@@ -276,9 +274,6 @@ void rtw_hal_set_odm_var(struct adapter *padapter,
 			 enum hal_odm_variable eVariable, void *pValue1,
 			 bool bSet);
 
-void rtw_hal_enable_interrupt(struct adapter *padapter);
-void rtw_hal_disable_interrupt(struct adapter *padapter);
-
 u32	rtw_hal_inirp_init(struct adapter *padapter);
 u32	rtw_hal_inirp_deinit(struct adapter *padapter);