chore: delete valiedate webhook function

[Rory-Z]

No description provided.

[codecov]

Codecov Report

Patch coverage: 33.33% and project coverage change: -0.49% ⚠️

Comparison is base (ef84e86) 77.41% compared to head (dacd054) 76.92%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #926      +/-   ##
==========================================
- Coverage   77.41%   76.92%   -0.49%     
==========================================
  Files          67       67              
  Lines        6044     6007      -37     
==========================================
- Hits         4679     4621      -58     
- Misses       1142     1158      +16     
- Partials      223      228       +5     

Files Changed	Coverage Δ
apis/apps/v2beta1/emqx_webhook.go	52.94% <ø> (-39.92%)	⬇️
controllers/apps/v2beta1/sync_emqx_config.go	55.10% <33.33%> (-8.44%)	⬇️

... and 5 files with indirect coverage changes

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