USB: cdc-acm: remove superfluous prototype

Remove unnecessary acm_tty_chars_in_buffer prototype.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 0 insertions, 2 deletions

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index a693381ed3cc..b84ccec8fc7b 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -626,8 +626,6 @@ static void acm_tty_unregister(struct acm *acm)
         kfree(acm);
 }
 
-static int acm_tty_chars_in_buffer(struct tty_struct *tty);
-
 static void acm_port_down(struct acm *acm)
 {
         int i, nr = acm->rx_buflimit;