vt: drop redundant might_sleep() in do_con_write()

The might_sleep() in do_con_write() is redundant because console_lock()
already contains might_sleep().  Remove it.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Link: https://lore.kernel.org/r/20200224073450.292892-1-ebiggers@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/vt/vt.c

@@ -2577,8 +2577,6 @@ static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int co
 	if (in_interrupt())
 		return count;
 
-	might_sleep();
-
 	console_lock();
 	vc = tty->driver_data;
 	if (vc == NULL) {