Staging: hv: remove unneeded OnHostRescan callback

This callback was never called, so delete the thing.

Cc: Hank Janssen <hjanssen@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/StorVscApi.h

@@ -91,9 +91,6 @@ struct storvsc_driver_object {
 	/* Maximum # of requests in flight per channel/device */
 	u32 MaxOutstandingRequestsPerChannel;
 
-	/* Set by the caller to allow us to re-enumerate the bus on the host */
-	void (*OnHostRescan)(struct hv_device *Device);
-
 	/* Specific to this driver */
 	int (*OnIORequest)(struct hv_device *Device,
 			   struct hv_storvsc_request *Request);

drivers/staging/hv/storvsc_drv.c

@@ -148,7 +148,6 @@ static int storvsc_drv_init(int (*drv_init)(struct hv_driver *drv))
 	vmbus_get_interface(&storvsc_drv_obj->Base.VmbusChannelInterface);
 
 	storvsc_drv_obj->RingBufferSize = storvsc_ringbuffer_size;
-	storvsc_drv_obj->OnHostRescan = storvsc_host_rescan;
 
 	/* Callback to client driver to complete the initialization */
 	drv_init(&storvsc_drv_obj->Base);