remove doas.conf since the permission check is too onerous.

the doas program itself will refuse to use an insecure config file.
(changelist will continue to watch for changes, as well.)

src/etc/mtree/special

@@ -1,4 +1,4 @@
-#	$OpenBSD: special,v 1.115 2015/08/03 04:19:25 yasuoka Exp $
+#	$OpenBSD: special,v 1.116 2015/12/05 09:12:15 tedu Exp $
 #
 # Hand-crafted mtree specification for the dangerous files.
 #
@@ -22,7 +22,6 @@ csh.logout	type=file mode=0644 uname=root gname=wheel
 daily		type=file mode=0644 uname=root gname=wheel
 daily.local	type=file mode=0644 uname=root gname=wheel optional
 dhcpd.conf	type=file mode=0644 uname=root gname=wheel optional
-doas.conf	type=file mode=0640 uname=root gname=wheel optional
 dvmrpd.conf	type=file mode=0600 uname=root gname=wheel optional
 exports		type=file mode=0644 uname=root gname=wheel optional
 fbtab		type=file mode=0644 uname=root gname=wheel