Remove data lib

[martin-springer]

Describe your changes

Please include a summary of the changes and the related issue. Please also include relevant motivation and context. List any dependencies that are required for this change.

Issue ticket number and link

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• [x] 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)
• [ ] This change requires a documentation update

Checklist before requesting a review

• [x] I have performed a self-review of my code
• [ ] Code changes are covered by tests.
• [x] Code changes have been evaluated for compatibility/integration with Scenario analysis (for future PRs)
• [x] New functions added to init.py
• [x] API.rst is up to date, along with other sphinx docs pages
• [x] Example notebooks are rerun and differences in results scrutinized
• [ ] What's new changelog has been updated in the docs

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 55.55556% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 63.30%. Comparing base (9812479) to head (0514d26).

Files	Patch %	Lines
pvdeg/utilities.py	50.00%	2 Missing :warning:
pvdeg/humidity.py	0.00%	1 Missing :warning:
pvdeg/weather.py	50.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## development #86 +/- ## =============================================== + Coverage 63.24% 63.30% +0.05% =============================================== Files 29 29 Lines 2068 2063 -5 =============================================== - Hits 1308 1306 -2 + Misses 760 757 -3 ```

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