Remove FF_CONFIRMATION_VIEW, FF_SWAPS_DECODING, FF_TWAPS_DECODING

[hectorgomezv]

Description

Some feature flags were added to the service to manage the availability of the Swap/Twap transaction mappings. Once these features are established, we can remove both the configuration/environment variables and the code associated with them.

Requirements

• Delete FF_CONFIRMATION_VIEW along with the code associated.
• Delete FF_SWAPS_DECODING along with the code associated.
• Delete FF_TWAPS_DECODING along with the code associated.