d/control: Remove ancient X-Python3-Version field

debian/changelog

@@ -1,6 +1,7 @@
 dulwich (0.19.1-2) UNRELEASED; urgency=medium
 
   * d/control: Remove ancient X-Python-Version field
+  * d/control: Remove ancient X-Python3-Version field
 
  -- Ondřej Nový <onovy@debian.org>  Mon, 14 May 2018 08:04:38 +0200
 

debian/control

@@ -6,7 +6,6 @@ Uploaders: Jelmer Vernooij <jelmer@debian.org>
 Homepage: https://www.dulwich.io/
 Build-Depends: python-all-dev (>= 2.6.6-3), python-all-dbg (>= 2.6.6-3), python3-all-dev, python3-all-dbg, debhelper (>= 9.20160114), python-unittest2, git (>= 1:1.7.0.4-2) [!alpha !ppc64 !sparc64 !x32], python-fastimport (>= 0.9.0~bzr293), python3-fastimport, pypy-dev [!hurd-any !m68k !sh4 !x32], dh-python, python-certifi, python3-certifi, python-urllib3, python3-urllib3
 Standards-Version: 4.1.1
-X-Python3-Version: >= 3.2
 Vcs-Git: https://salsa.debian.org/python-team/modules/dulwich.git
 Vcs-Browser: https://salsa.debian.org/python-team/modules/dulwich