fix: remove unreachable old RFC-Editor sync code. Flatten redirects.

[rjsparks]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 88.57%. Comparing base (b77e617) to head (af5bbe3).
⚠️ Report is 38 commits behind head on main.

Files with missing lines	Patch %	Lines
ietf/sync/views.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10967      +/-   ##
==========================================
+ Coverage   88.52%   88.57%   +0.04%     
==========================================
  Files         332      331       -1     
  Lines       44936    44439     -497     
==========================================
- Hits        39781    39362     -419     
+ Misses       5155     5077      -78     

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