drop the requirements.txt fixer hook

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.pre-commit-config.yaml

@@ -4,7 +4,6 @@ repos:
     hooks:
       - id: end-of-file-fixer
       - id: trailing-whitespace
-      - id: requirements-txt-fixer
       - id: end-of-file-fixer
 
   - repo: https://github.com/psf/black