Remove experimentation module and controller concern items
What does this MR do and why?
- removes controller concern and module layer items for experimentation that is no longer used.
- we'll look into removing the tables/models in a separate MR as part of #349246 (closed)
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 #349246 (closed)
Edited by Doug Stull