Remove metric files from db importers

What does this MR do and why?

Helps in removing files related to #397141 (closed)

Screenshots or screen recordings

NA

How to set up and validate locally

Everything should just work without these files and pipeline should be 💚

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #397141 (closed)