Remove Interaction.contact from state

[reupen]

Description of change

This removes the deprecated contact field from the Interaction model state.

The column will be removed from the database in a following release.

This is currently blocked as the data science platform is still using the column corresponding to this field.

Checklist

• Has a new newsfragment been created? Check changelog/README.rst for instructions
• Have any relevant search models been updated?
• Have any relevant fixtures (fixtures/test_data.yaml) been updated?
• Have any relevant select-/prefetch-related field lists in the views and search apps been updated?
• Has the admin site been updated (for new models, fields etc.)?
• Has the README been updated (if needed)?

[codecov]

Codecov Report

Merging #1556 into develop will decrease coverage by 0.02%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #1556      +/-   ##
===========================================
- Coverage    97.07%   97.05%   -0.03%     
===========================================
  Files          282      282              
  Lines         8414     8408       -6     
  Branches       813      812       -1     
===========================================
- Hits          8168     8160       -8     
- Misses         168      171       +3     
+ Partials        78       77       -1

Impacted Files	Coverage Δ
datahub/interaction/admin.py	92.45% <ø> (-4.16%)	⬇️
.../cleanup/management/commands/delete_old_records.py	100% <ø> (ø)	⬆️

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[currycoder]

One question inline