dirstatemap: remove `_insert_entry`
This was needed as a compatibility layer for the Python and Rust
implementations, but it is not called from anywhere in Rust anymore.
The two remaining calls have been inlined.
Differential Revision: https://phab.mercurial-scm.org/D12501
@echo off
powershell -NoProfile -ExecutionPolicy unrestricted -Command "& '%~dp0\editmergeps.ps1' %*"