Backport 6243: removed redundant contextual validation in ATX V1 handler

[fasmat]

Motivation

Backport of #6243

Description

Only backport of #6243

Test Plan

• n/a

TODO

• Explain motivation or link existing issue(s)
• Test changes and document test plan
• Update documentation as needed
• Update changelog as needed

[codecov]

Codecov Report

Attention: Patch coverage is 60.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 81.7%. Comparing base (f07c531) to head (0a1d2b8).
Report is 2 commits behind head on v1.6.

Files	Patch %	Lines
activation/handler_v2.go	33.3%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            v1.6   #6245     +/-   ##
=======================================
- Coverage   81.7%   81.7%   -0.1%     
=======================================
  Files        301     301             
  Lines      32306   32290     -16     
=======================================
- Hits       26416   26396     -20     
- Misses      4170    4174      +4     
  Partials    1720    1720             

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