Fix/#342 bug pyomo update

[joda9]

Description

Updated dependencies to PyPSA 0.26.2 and removed the specified Pyomo version to allow compatibility with the version used by PyPSA. Deleted unused curtailment and storage positioning functions.

Fixes #342.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• New and adjusted code is formatted using the pre-commit hooks
• New and adjusted code includes type hinting now
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• The Read the Docs documentation is compiling correctly
• If new packages are needed, I added them to the setup.py, and if needed to the rtd_requirements.txt, the eDisGo_env.yml, and the eDisGo_env_dev.yml.
• I have added new features to the corresponding whatsnew file