Stop writting PollStats rows

[norkans7]

No description provided.

[Copilot]

Pull request overview

This PR removes code that writes to the PollStats model as part of migrating to the newer PollStatsCounter model for tracking poll statistics. The changes are focused on removing write operations while preserving the existing PollStatsCounter functionality.

Key Changes:

• Removed PollStats object creation and bulk insertion from poll results counting logic
• Removed PollStats deletion logic from the delete_poll_stats method
• Removed the unused get_question_stats classmethod from the PollStats model
• Updated test assertions to remove PollStats checks while keeping PollStatsCounter checks

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
ureport/stats/models.py	Removed the unused get_question_stats classmethod that filtered PollStats objects
ureport/polls/models.py	Removed PollStats import, object creation, bulk insert, and deletion logic from poll statistics methods
ureport/polls/tests.py	Removed PollStats assertions from test_delete_poll_stats and test_poll_results_stats while preserving PollStatsCounter test coverage
ureport/public/tests.py	Removed extraneous blank line for code cleanup

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.82%. Comparing base (3059370) to head (1c945fb).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1324      +/-   ##
==========================================
+ Coverage   83.79%   83.82%   +0.02%     
==========================================
  Files          49       49              
  Lines        6066     6051      -15     
==========================================
- Hits         5083     5072      -11     
+ Misses        983      979       -4     

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