Revert "package/tar: allowing building even on non-Y2038 compliant systems"

This reverts commit 7f1088f9cae9f191740423a0084bb31f94af2e75.

We're going back to tar 1.34, so this needs to be reverted as well.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/tar/tar.mk

@@ -7,15 +7,9 @@
 TAR_VERSION = 1.35
 TAR_SOURCE = tar-$(TAR_VERSION).tar.xz
 TAR_SITE = $(BR2_GNU_MIRROR)/tar
-# --exec-prefix=/: busybox installs in /bin, so we need tar to install
-# as well in /bin so that we don't end up with two different tar
-#
-# --disable-year2038: tells the configure script to not abort if the
-# system is not Y2038 compliant. tar will support year2038 if the
-# system is compliant even with this option passed
-TAR_CONF_OPTS = \
-	--exec-prefix=/ \
-	--disable-year2038
+# busybox installs in /bin, so we need tar to install as well in /bin
+# so that we don't end up with two different tar
+TAR_CONF_OPTS = --exec-prefix=/
 TAR_LICENSE = GPL-3.0+
 TAR_LICENSE_FILES = COPYING
 TAR_CPE_ID_VENDOR = gnu