No bug: Don't get full changesets when getting pushlog info; r=aki

Since we don't look at the changesets, there is no need for hgmo to generate
them for us.

Differential Revision: https://phabricator.services.mozilla.com/D70567

--HG--
extra : moz-landing-system : lando

taskcluster/taskgraph/util/hg.py

@@ -11,7 +11,7 @@ import six
 import subprocess
 from redo import retry
 
-PUSHLOG_TMPL = '{}/json-pushes?version=2&changeset={}&tipsonly=1&full=1'
+PUSHLOG_TMPL = '{}/json-pushes?version=2&changeset={}&tipsonly=1'
 
 
 def find_hg_revision_push_info(repository, revision):