Remove transitive dependency sqlparse from example/requirements.txt

[vtalos]

Fixes #1284

Description of the Change

As part of our ongoing research on Python dependency management we noticed a potential improvement in your project’s dependency management.

Specifically, the transitive dependency sqlparse, which is required by Django, is specified as a requirement in the example/requirements.txt file, even though it is not used directly and does not need to be listed explicitly.

This PR removes it from example/requirements.txt to let pip manage it automatically, which helps keeping the dependency list clean.

Hope this is helpful!

Checklist

• PR only contains one change (considered splitting up PR)
• unit-test added
• documentation updated
• CHANGELOG.md updated (only for user relevant changes)
• author name in AUTHORS

[sliverc]

Thanks for the hinter. Actually, the example/requirements.txt file is obsolete and is not referenced anywhere or used at this point. Therefore, example/requirements.txt can be completely removed, as the requirements.txt in the root folder is the correct one and referenced in the README,

[sliverc]

Super seeded by #1287 therefore closing. Thanks for your initial hinter.