Remove obsolete compatibility code
requested to merge 334821-update-dora-api-to-return-consistent-structure-when-interval-all into master
What does this MR do and why?
The code did nothing for a while so it's safe to remove it.
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.
Related to #334821 (closed)