fix: Remove unit tests from pre-commit hooks

Pre-commit hooks should be fast. Running tests on every commit:
- Slows down the development workflow
- Fails legitimately when creating reproducers before fixes

Tests are better suited for CI workflows where they run in parallel
and don't block local commits.

Fixes #1356

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: dimitri-yatsenko

.pre-commit-config.yaml

@@ -47,12 +47,3 @@ repos:
         - types-tqdm
         - pandas-stubs
         - numpy
-- repo: local
-  hooks:
-    - id: unit-tests
-      name: unit tests
-      entry: pytest tests/unit/ -v --tb=short
-      language: system
-      pass_filenames: false
-      always_run: true
-      stages: [pre-commit]