Martin von Zweigbergk <martinvonz@google.com> [Wed, 16 Jan 2019 16:55:52 -0800] rev 41269
bdiff: drop duplicate definition of splitnewlines()
It was added in 29dd37a418aa (bdiff: write a native version of
splitnewlines, 2018-01-25).
Differential Revision: https://phab.mercurial-scm.org/D5618