feat: remove DocAlias

[rjsparks]

No description provided.

[codecov]

Codecov Report

Merging #6153 (cbfb5e8) into feat/rfc (114a3c5) will increase coverage by 0.04%.
The diff coverage is 87.23%.

@@             Coverage Diff              @@
##           feat/rfc    #6153      +/-   ##
============================================
+ Coverage     88.53%   88.57%   +0.04%     
============================================
  Files           290      290              
  Lines         40292    40157     -135     
============================================
- Hits          35672    35569     -103     
+ Misses         4620     4588      -32     

Files Changed	Coverage Δ
ietf/doc/urls.py	100.00% <ø> (ø)
ietf/secr/utils/document.py	0.00% <ø> (-40.00%)	⬇️
ietf/stats/models.py	83.33% <ø> (ø)
ietf/submit/models.py	93.96% <ø> (ø)
ietf/doc/utils.py	87.54% <45.45%> (+0.22%)	⬆️
ietf/secr/telechat/views.py	79.91% <50.00%> (ø)
ietf/ipr/utils.py	58.33% <52.38%> (+3.94%)	⬆️
ietf/meeting/utils.py	88.42% <60.00%> (-0.07%)	⬇️
ietf/group/views.py	90.46% <66.66%> (+0.21%)	⬆️
ietf/doc/models.py	88.60% <72.72%> (+0.90%)	⬆️
... and 37 more

... and 1 file with indirect coverage changes

[jennifer-richards]

A few comments to address / discuss, but looks like it's in good shape. Most of the bugs I came across are not new with this work, but we should fix them while we're touching the code.