remove libattr build depn since we use native glibc xattr support now

debian/changelog

+tar (1.30+dfsg-7) unstable; urgency=medium
+
+  * remove libattr1-dev build-dep, as we no longer use it, closes: #953902
+
+ -- Bdale Garbee <bdale@gag.com>  Sat, 14 Mar 2020 14:24:29 -0600
+
 tar (1.30+dfsg-6) unstable; urgency=medium
 
   * eliminate ancient prerm cleanup code that breaks with merged /usr, 

debian/control

@@ -3,7 +3,7 @@ Section: utils
 Priority: required
 Maintainer: Bdale Garbee <bdale@gag.com>
 Uploaders: Carl Worth <cworth@cworth.org>
-Build-Depends: debhelper (>> 10), gettext, autoconf, automake, autopoint, libacl1-dev, libattr1-dev, libselinux1-dev [linux-any]
+Build-Depends: debhelper (>> 10), gettext, autoconf, automake, autopoint, libacl1-dev, libselinux1-dev [linux-any]
 Standards-Version: 4.3.0
 Vcs-Git: https://salsa.debian.org/debian/tar.git
 Vcs-Browser: https://salsa.debian.org/debian/tar