Remove dependency on pre-commit

Remove dependency on pre-commit

lftools has 0 dependencies on pre-commit and thus should not be
listed as one of its requirements. lftools simply uses pre-commit
as a linter which the dependency is already covered by the tox.ini
deps configuration.

Commit 54d1936f introduces what seems like an exceptionally large
list of dependencies which should be re-evaluated if lftools really
depends on any of those packages directly as some of those deps
are likely not really deps of lftools. This patch simply takes care
of pre-commit as I don't currently have time for a full audit.

Change-Id: I18acffc492ba6905e639cdb452dee0c2f5f2fcbb
Signed-off-by: Thanh Ha <zxiiro@gmail.com>