Martin von Zweigbergk <martinvonz@google.com> [Tue, 14 Dec 2021 13:41:34 -0800] rev 48508
filemerge: remove leftover documentation of removed argument
I removed the `premerge` argument in
https://phab.mercurial-scm.org/D11859.
Differential Revision: https://phab.mercurial-scm.org/D11925