Remove unused feature flag code
What does this MR do and why?
Follow-up for !115888 (merged)
The feature flag was removed, but this code was not updated.
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR.
Edited by Vasilii Iakliushin