Revert "Allow users to delete accounts even when they have active teams"

[knolleary]

Reverts #4354

This was causing teams to be orphaned with active subscriptions.

Reverting to prevent the situation continuing over the weekend. Will rework the original PR to do the appropriate subscription work on Monday.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.05%. Comparing base (31e884b) to head (8cfcf4a).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4528      +/-   ##
==========================================
- Coverage   78.07%   78.05%   -0.03%     
==========================================
  Files         300      300              
  Lines       14285    14270      -15     
  Branches     3241     3237       -4     
==========================================
- Hits        11153    11138      -15     
  Misses       3132     3132              

Flag	Coverage Δ
backend	78.05% <100.00%> (-0.03%)	⬇️

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