fix: Remove IESG-related about tabs from non-IETF-stream docs

[larseggert]

Fixes #5514

[codecov]

Codecov Report

Merging #5515 (4b5770d) into main (62d6891) will increase coverage by 0.07%.
The diff coverage is 95.83%.

@@            Coverage Diff             @@
##             main    #5515      +/-   ##
==========================================
+ Coverage   88.66%   88.73%   +0.07%     
==========================================
  Files         288      288              
  Lines       39949    39964      +15     
==========================================
+ Hits        35421    35463      +42     
+ Misses       4528     4501      -27     

Impacted Files	Coverage Δ
ietf/doc/utils_search.py	81.17% <50.00%> (+0.58%)	⬆️
ietf/doc/feeds.py	99.24% <100.00%> (+23.61%)	⬆️
ietf/doc/views_doc.py	91.62% <100.00%> (+<0.01%)	⬆️
ietf/group/views.py	90.53% <100.00%> (+<0.01%)	⬆️
ietf/meeting/models.py	85.15% <100.00%> (ø)
ietf/nomcom/forms.py	95.39% <100.00%> (ø)

... and 2 files with indirect coverage changes