Remove security on operation level fix

[p1c2u]

Fixes #280

[codecov]

Codecov Report

Merging #284 (dcec29b) into master (b6a745c) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #284   +/-   ##
=======================================
  Coverage   96.80%   96.81%           
=======================================
  Files         122      122           
  Lines        2412     2416    +4     
=======================================
+ Hits         2335     2339    +4     
  Misses         77       77           

Impacted Files	Coverage Δ
openapi_core/schema/operations/generators.py	100.00% <100.00%> (ø)
openapi_core/schema/operations/models.py	100.00% <100.00%> (ø)
openapi_core/validation/request/validators.py	95.13% <100.00%> (+0.06%)	⬆️

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