Resolve "Remove plot creator auto detection via plot function signature"

This MR removes the feature that auto-detected a plot creator from the plot function signature, as deprecated in #100 (closed), %Version 0.10.

Anything to double-check?

Did I miss anything?

Can this MR be accepted?

• Removed plot creator auto detection using the plot function signature
• Removed corresponding tests
  • Checked code coverage; is reduced by 0.06% because the corresponding code was 100% tested.
• Pipeline passes
• Changelog entry added
• Version bumped
• History cleaned-up or squash option set
• Approved by @jeremiastraub

Related issues

Closes #101 (closed)