vt: remove 25 years stale comment

vc_cons was made global (non-static) in 1.3.38, almost 25 years ago.
Remove a comment which says that it would be a disadvantage to do so :P.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20200615074910.19267-7-jslaby@suse.czSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/console_struct.h

@@ -167,8 +167,7 @@ struct vc {
 	struct work_struct SAK_work;
 
 	/* might add  scrmem, kbd  at some time,
-	   to have everything in one place - the disadvantage
-	   would be that vc_cons etc can no longer be static */
+	   to have everything in one place */
 };
 
 extern struct vc vc_cons [MAX_NR_CONSOLES];