Remove model_connector.py

[daniellepintz]

What does this PR do?

Fixes #10110

Does your PR introduce any breaking changes? If yes, please list them.

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[carmocca]

The title says "Deprecate" but there's nothing being deprecated here

[codecov]

Codecov Report

Merging #10111 (03b5b5e) into master (34d5980) will decrease coverage by 4%.
The diff coverage is 100%.

@@           Coverage Diff            @@
##           master   #10111    +/-   ##
========================================
- Coverage      93%      89%    -4%     
========================================
  Files         181      180     -1     
  Lines       16150    16145     -5     
========================================
- Hits        14939    14318   -621     
- Misses       1211     1827   +616