Let's stop sending waffle flags in whoami

[peterbe]

Fixes #7882

This is the before:

Let's remember to check back on those graphs after this change makes it into prod.

[codecov-commenter]

Codecov Report

Merging #7883 (7e48cfb) into master (d678bcc) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #7883      +/-   ##
==========================================
+ Coverage   91.27%   91.29%   +0.02%     
==========================================
  Files         230      230              
  Lines       20288    20274      -14     
  Branches     1599     1590       -9     
==========================================
- Hits        18517    18509       -8     
+ Misses       1509     1505       -4     
+ Partials      262      260       -2     

Impacted Files	Coverage Δ
kuma/api/v1/views.py	96.33% <ø> (+2.67%)	⬆️
kuma/api/v1/tests/test_views.py	100.00% <100.00%> (ø)

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[escattone]

Looks and works just fine, thanks so much @peterbe! It feels good to get rid of this.

[peterbe]

The times after:

That was entirely predictable. But. oh man does that feel good!!