Revert "mkconfig: start deprecating Makefile config targets"

This reverts commit 1285a2808a254f3d1a809c1a541f0c0f746e03d7 since the migration
of boards from Makefile to boards.cfg is now complete.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
diff --git a/doc/feature-removal-schedule.txt b/doc/feature-removal-schedule.txt
index 58db440..ce72861 100644
--- a/doc/feature-removal-schedule.txt
+++ b/doc/feature-removal-schedule.txt
@@ -51,22 +51,6 @@
 
 ---------------------------
 
-What:	boards with xxx_config targets in top level Makefile
-When:	Release v2012.03
-
-Why:	We have a boards.cfg file which the vast majority of boards have
-	converted over to.  Boards that still manually run mkconfig in the
-	top level Makefile are either dead, or the maintainer doesn't care,
-	or they are doing something weird/wrong that should be fixed in a
-	different way, or they need to extend boards.cfg syntax (unlikely).
-
-	In any case, if no one cares about these boards to figure out how
-	to make boards.cfg work, then we'll just punt them.
-
-Who:	Mike Frysinger <vapier@gentoo.org>
-
----------------------------
-
 What:	GPL cleanup
 When:	August 2009
 Why:	Over time, a couple of files have sneaked in into the U-Boot
diff --git a/mkconfig b/mkconfig
index 7c9aa74..73f852e 100755
--- a/mkconfig
+++ b/mkconfig
@@ -29,15 +29,6 @@
 	set ${line}
 	# add default board name if needed
 	[ $# = 3 ] && set ${line} ${1}
-elif [ "${MAKEFLAGS+set}${MAKELEVEL+set}" = "setset" ] ; then
-	# only warn when using a config target in the Makefile
-	cat <<-EOF
-
-	warning: Please migrate to boards.cfg.  Failure to do so will
-	         mean removal of your board in the next release.
-
-	EOF
-	sleep 5
 fi
 
 while [ $# -gt 0 ] ; do