Drop pristine-tar

debian/changelog

+swh.graph (2.1.2-2~swh1) unstable-swh; urgency=medium
+
+  * Drop pristine-tar
+
+ -- Nicolas Dandrimont <olasd@debian.org>  Tue, 20 Dec 2022 15:40:20 +0100
+
 swh.graph (2.1.2-1~swh1) unstable-swh; urgency=medium
 
   * New upstream release 2.1.2     - (tagged by Valentin Lorentz

debian/gbp.conf

@@ -2,6 +2,4 @@
 upstream-branch=debian/upstream
 upstream-tag=debian/upstream/%(version)s
 debian-branch=debian/unstable-swh
-pristine-tar=True
 filter=['java/target/*']
-