Remove support for unsafe regular expressions
What does this MR do and why?
This merge request removes a feature flag, that has been disabled by default for a while already, that makes it possible to use unsafe regular expressions, especially in CI/CD configuration, what could be leveraged into a DoS attack.
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 Grzegorz Bizon