staging: r8188eu: remove hal_xmitframe_enqueue from struct hal_ops

Remove hal_xmitframe_enqueue function pointer from struct hal_ops, as it
is unused.
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210906010106.898-11-phil@philpotter.co.ukSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/include/hal_intf.h

@@ -192,8 +192,6 @@ struct hal_ops {
 			    struct xmit_frame *pxmitframe);
 	s32 (*mgnt_xmit)(struct adapter *padapter,
 			 struct xmit_frame *pmgntframe);
-	s32 (*hal_xmitframe_enqueue)(struct adapter *padapter,
-				     struct xmit_frame *pxmitframe);
 
 	u32	(*read_bbreg)(struct adapter *padapter, u32 RegAddr,
 			      u32 BitMask);