usb: gadget: bdc: remove bdc_ep_set_halt() declaration

No definition for bdc_ep_set_halt(), so remove it.

Cc: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1610505748-30616-2-git-send-email-chunfeng.yun@mediatek.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/gadget/udc/bdc/bdc_cmd.h

@@ -16,7 +16,6 @@ int bdc_dconfig_ep(struct bdc *, struct bdc_ep *);
 int bdc_stop_ep(struct bdc *, int);
 int bdc_ep_set_stall(struct bdc *, int);
 int bdc_ep_clear_stall(struct bdc *, int);
-int bdc_ep_set_halt(struct bdc_ep *, u32 , int);
 int bdc_ep_bla(struct bdc *, struct bdc_ep *, dma_addr_t);
 int bdc_function_wake(struct bdc*, u8);
 int bdc_function_wake_fh(struct bdc*, u8);