USB: usb-skeleton: Remove unnecessary casts of private_data

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/usb-skeleton.c b/drivers/usb/usb-skeleton.c
index d110588..552679b 100644
--- a/drivers/usb/usb-skeleton.c
+++ b/drivers/usb/usb-skeleton.c
@@ -142,7 +142,7 @@
 {
 	struct usb_skel *dev;
 
-	dev = (struct usb_skel *)file->private_data;
+	dev = file->private_data;
 	if (dev == NULL)
 		return -ENODEV;
 
@@ -162,7 +162,7 @@
 	struct usb_skel *dev;
 	int res;
 
-	dev = (struct usb_skel *)file->private_data;
+	dev = file->private_data;
 	if (dev == NULL)
 		return -ENODEV;
 
@@ -246,7 +246,7 @@
 	int rv;
 	bool ongoing_io;
 
-	dev = (struct usb_skel *)file->private_data;
+	dev = file->private_data;
 
 	/* if we cannot read at all, return EOF */
 	if (!dev->bulk_in_urb || !count)
@@ -401,7 +401,7 @@
 	char *buf = NULL;
 	size_t writesize = min(count, (size_t)MAX_TRANSFER);
 
-	dev = (struct usb_skel *)file->private_data;
+	dev = file->private_data;
 
 	/* verify that we actually have some data to write */
 	if (count == 0)