largefiles: remove redundant "updatelfiles" invocation in "lfilesrepo.commit" After previous patches, largefiles in the working directory are ensured to be updated before "repo.commit" invocation for automated committing below: - by "overrides.mergeupdate" via "merge.update" for rebase - by "overrides.scmutilmarktouched" via "patch.patch" for transplant This patch removes redundant "lfcommands.updatelfiles" invocation in "Case 0" code path of "lfilesrepo.commit" for automated committing, and revises detailed comment.