Remove Candy Machine V2 and V3 parsing

[danenbm]

Notes

This is also left as a comment in the module:

// Candy Machine V3 parsing was removed because Candy Guard (`mpl-candy-guard`) and
// Candy Machine Core (`mpl-candy-machine-core`) were dependent upon a specific Solana
// version (1.16), there was no Candy Machine parsing in DAS (`digital-asset-rpc-infrastructure`),
// and we wanted to use the Rust clients for Bubblegum and Token Metadata so that going forward we
// could more easily update blockbuster to new Solana versions.
//
// Candy Machine V2 (`mpl-candy-machine`) parsing was removed at the same time as V3 because even
// though it did not depend on the `mpl-candy-machine` crate, it was also not being used by DAS.