Opening the PR as a draft to spark discussion. Should we target removing all dead code? I don't mind occasionally putting time towards this as a project if we want to fully remove any and all dead code originating from Komodo. We could additionally remove quite a bit of code related to Komodo's deprecated "PAX" features.

Changelog:

• Removes deprecated cryptoconditions originating from Komodo.
• Removes cryptoconditions gtest framework tests. Leaves test-komodo/test_cryptoconditions.cpp in place as an example case.
• Removes a duplicated definition for libbitcoin_wallet.a within Makefile.am
• Removes various code related to various deprecated RPC methods: paxprices, paxprice, kvsearch, kvupdate, paxpending, MoMoMdata, calc_MoM, height_MoM, assetchainproof, crosschainproof, getNotarisationsForBlock, scanNotarisationsDB, migrate_converttoexport, migrate_createimporttransaction, migrate_completeimporttransaction, getbalance64
• Removes CScript::IsCoinImport. This was previously set to always return false. All logic referencing it has now been removed. This change requires thorough review of the changes within main.cpp.
• Removes various dead code helpers and utility functions from cc/CCutils.cpp

This test-komodo/test_cryptoconditions.cpp is left in place to serve as an example for how to implement a new gtest within the test-komodo binary. If we want to remove this, we could remove the entire test framework, but I believe it's useful for future testing.