Revert "Add basic pre-commit config..."

This reverts commit "Add basic pre-commit configuration for
tuf/api/*" (44aea45) in order to
reduce maintenance burdern:

- pre-commit really is a package manager, thus the packages (git
hooks) pulled in via pre-commit would need to be kept up-to-date
and securely so (sic!).

- pre-commit requires contributors to opt-in via "pre-commit
install" regardless, so we might as well ask contributors to add
and tend to the corresponding configuration file on their own.

Signed-off-by: Lukas Puehringer <lukas.puehringer@nyu.edu>

Author: Lukas Puehringer

.pre-commit-config.yaml

@@ -105,16 +105,6 @@ To work on the TUF project, it's best to perform a development install.
     $ pip install -r requirements-dev.txt
 
 
-Auto-formatting
-===============
-
-New TUF code should be auto-formatted with `black <https://black.readthedocs.io/>`_
-and `isort <https://pycqa.github.io/isort>`_. The tasks can be installed as
-`pre-commit <https://pre-commit.com/>`_ git hooks with the following command.
-::
-    $ pre-commit install
-
-
 Testing
 =======
 

docs/CONTRIBUTORS.rst

@@ -1,6 +1,5 @@
 # Install tuf in editable mode and requirements for local testing with tox,
 # and also for running test suite or individual tests manually
 tox
-pre-commit
 -r requirements-test.txt
 -e .