pre-commit: remove args from black

The arguments here were causing black to not output any changes, and so
pre-commit wasn't enforcing coding style. This actually explains quite a
bit.

Signed-off-by: Stephen Brennan <[email protected]>

Author: brenns10

.pre-commit-config.yaml

@@ -15,7 +15,6 @@ repos:
     rev: "23.7.0"
     hooks:
     -   id: black
-        args: ['--line-length=79', '--diff']
 -   repo: https://github.com/pycqa/flake8
     rev: "6.1.0"
     hooks: