Remove deprecated functions

[martin-springer]

• [ ] Code changes are covered by tests
• [x] Code changes have been evaluated for compatibility/integration with TrendAnalysis
• [x] Deprecated functions removed from __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
• [x] Updated changelog

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 75.52%. Comparing base (d1eb662) to head (1a8b45e).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## aggregated_filters_for_trials #419 +/- ## ================================================================= + Coverage 75.25% 75.52% +0.26% ================================================================= Files 13 13 Lines 2825 2807 -18 ================================================================= - Hits 2126 2120 -6 + Misses 699 687 -12 ```

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