remotefilelog: remove some BC code related to streamclone
Since remotefilelog is now moved to core and we have
streamclone._walkstreamfiles() in core, we don't need to have the backward
compatibility code.
People with old mercurial version should use remotefilelog from hg-experimental
repo as IMO remotefilelog will go under a good refactoring and old clients will
break.
# no-check-commit foo_bar function name
Differential Revision: https://phab.mercurial-scm.org/D5189
Test issue2761
$ hg init
$ touch to-be-deleted
$ hg add
adding to-be-deleted
$ hg ci -m first
$ echo a > to-be-deleted
$ hg ci -m second
$ rm to-be-deleted
$ hg diff -r 0
Same issue, different code path
$ hg up -C
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ touch does-not-exist-in-1
$ hg add
adding does-not-exist-in-1
$ hg ci -m third
$ rm does-not-exist-in-1
$ hg diff -r 1