infinitepush: drop hack related to --to, --create flags of remotenames-ext
The remotenames extension has --to, --create. --allow-anon flags which won't be
ported to core. This patch drops the hack which fixes the interaction with
remotenames-ext during push.
In upcoming patches, --to and --create extensions will be removed from
infinitepush also.
Differential Revision: https://phab.mercurial-scm.org/D2105
test-convert-git.t
test-subrepo-git.t
test-patchbomb-tls.t