Remove legacy gecko market recommender files

- Deleted the `gecko_market_recommender.py` and `gecko_market_recommender_v2.py` files as part of the ongoing refactor to streamline the codebase.
- This removal eliminates outdated implementations and prepares the codebase for the new market recommender structure, enhancing maintainability and clarity.
- The changes support the transition to a more efficient and organized market data processing system, aligning with recent updates to the API routes and data handling.

Author: goldhaxx