spec: rely on rpmbuild with config.{guess,sub} substitution

Related: #926610
Version: 1.26-24

tar.spec

@@ -94,16 +94,12 @@ Patch13: tar-1.26-allow-extract-single-volume.patch
 # ~> upstream: 7b5e803963
 Patch14: tar-1.26-command-args.patch
 
-# Allow to build on aarch64 also
-# ~> #926610 (downstream)
-Patch15: tar-1.26-arm-config-sub-guess.patch
-
 # Do not print xattrs/selinux/acls when --no-xattrs/--no-acls/--no-selinux
 # options are used during -tvv output.  (TODO: merge this with xattrs patch
 # once becomes upstream)
 # ~> downstream (yet)
 # ~> proposal: http://lists.gnu.org/archive/html/bug-tar/2013-05/msg00020.html
-Patch16: tar-1.26-xattrs-printing.patch
+Patch15: tar-1.26-xattrs-printing.patch
 
 # Silence gcc warnings
 # ~> upstream tar: 17f99bc6f, 5bb0433
@@ -157,8 +153,7 @@ the rmt package.
 %patch12 -p1 -b .pax-sparse-big-files
 %patch13 -p1 -b .extract-single-volume
 %patch14 -p1 -b .command-args
-%patch15 -p1 -b .arm-config-guess-sub
-%patch16 -p1 -b .print-xattrs-fix
+%patch15 -p1 -b .print-xattrs-fix
 %patch999 -p1 -b .silence-gcc
 
 autoreconf -v
@@ -221,6 +216,8 @@ fi
 * Thu May 30 2013 Pavel Raiskup <praiskup@redhat.com> - 2:1.26-24
 - use /usr/bin/ssh as the default remote shell binary (#969015)
 - do not verbose-print xattrs when --no-xattrs option is used
+- do not override the config.{guess,sub} twice, this is already done by the
+  redhat-rpm-config package (#951442)
 
 * Tue May 28 2013 Pavel Raiskup <praiskup@redhat.com> - 2:1.26-23
 - again search for 'rmt' binary in %%{_sbindir} on target host