examples/inittab: fix a few incorrect statements about init

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

examples/inittab

@@ -15,10 +15,7 @@
 #	the specified process to run on.  The contents of this field are
 #	appended to "/dev/" and used as-is.  There is no need for this field to
 #	be unique, although if it isn't you may have strange results.  If this
-#	field is left blank, it is completely ignored.  Also note that if
-#	BusyBox detects that a serial console is in use, then all entries
-#	containing non-empty id fields will be ignored.  BusyBox init does
-#	nothing with utmp.  We don't need no stinkin' utmp.
+#	field is left blank, then the init's stdin/out will be used.
 #
 # <runlevels>: The runlevels field is completely ignored.
 #
@@ -43,9 +40,6 @@
 #         ::shutdown:/sbin/swapoff -a
 #         ::shutdown:/bin/umount -a -r
 #         ::restart:/sbin/init
-#
-# if it detects that /dev/console is _not_ a serial console, it will
-# also run:
 #         tty2::askfirst:/bin/sh
 #         tty3::askfirst:/bin/sh
 #         tty4::askfirst:/bin/sh