Drop transition for old debug package migration.

Changes-By: lintian-brush
Fixes: lintian: debug-symbol-migration-possibly-complete
See-also: https://lintian.debian.org/tags/debug-symbol-migration-possibly-complete.html

debian/changelog

@@ -2,6 +2,7 @@ dulwich (0.20.25-2) UNRELEASED; urgency=medium
 
   * Bump debhelper from old 12 to 13.
   * Set upstream metadata fields: Security-Contact.
+  * Drop transition for old debug package migration.
 
  -- Debian Janitor <janitor@jelmer.uk>  Sun, 19 Sep 2021 14:38:03 -0000
 

debian/rules

@@ -20,7 +20,7 @@ override_dh_installdocs:
 	dh_installdocs -ppython3-dulwich docs/tutorial -X.gitignore -XMakefile
 
 override_dh_strip:
-	dh_strip -p python3-dulwich --dbgsym-migration='python3-dulwich-dbg (<< 0.16.4-1)'
+	dh_strip -p python3-dulwich
 
 override_dh_installchangelogs:
 	dh_installchangelogs NEWS