Remove webhook

[pmachapman]

Fixes #988 #973 #968

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This change is 

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.65%. Comparing base (12be51e) to head (9069c61).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #996      +/-   ##
==========================================
+ Coverage   65.54%   65.65%   +0.11%     
==========================================
  Files         387      369      -18     
  Lines       21747    21123     -624     
  Branches     2770     2689      -81     
==========================================
- Hits        14253    13869     -384     
+ Misses       6454     6251     -203     
+ Partials     1040     1003      -37     

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[Enkidu93]

At some point, we remove webhooks from the Serval python client (i.e., regenerate it), but we haven't been too particular about keeping that up-to-date so far, so not urgent.

@Enkidu93 reviewed 50 files and all commit messages, and made 1 comment.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on ddaspit).

[ddaspit]

@ddaspit reviewed 50 files and all commit messages, and made 1 comment.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on pmachapman).