bxe: get rid of useless warning.
It's not like we don't know this, and it's just annoying.

Signed-off-by: Ron Minnich <rminnich@gmail.com>
diff --git a/kern/drivers/net/bxe/bxe.c b/kern/drivers/net/bxe/bxe.c
index ec6faf9..9b7e8df 100644
--- a/kern/drivers/net/bxe/bxe.c
+++ b/kern/drivers/net/bxe/bxe.c
@@ -16000,7 +16000,6 @@
     }
 }
 
-#warning "move sysctl to write to ctl file"
 #if 0
 static int
 bxe_sysctl_state(SYSCTL_HANDLER_ARGS)