feat: removes non-functional retirement partner report scripts

[deborahgu]

FIXES: APER-2936

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (ef4de4a) 74.74% compared to head (a8a1950) 72.37%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #704      +/-   ##
==========================================
- Coverage   74.74%   72.37%   -2.38%     
==========================================
  Files         105      101       -4     
  Lines        8585     7782     -803     
==========================================
- Hits         6417     5632     -785     
+ Misses       2168     2150      -18     

Flag	Coverage Δ
unittests	72.37% <ø> (-2.38%)	⬇️

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Files	Coverage Δ
tubular/edx_api.py	41.66% <ø> (-0.27%)	⬇️
tubular/tests/retirement_helpers.py	100.00% <ø> (ø)
tubular/tests/test_edx_api.py	97.64% <ø> (-0.34%)	⬇️

... and 2 files with indirect coverage changes

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