The resmoke multiversion constants module defines several constants that are no longer referenced anywhere in the repository and can be safely removed.

The following constants in multiversionconstants.py have no consumers outside their own definitions:

• LAST_LTS_BIN_VERSION
• LAST_CONTINUOUS_BIN_VERSION
• LAST_CONTINUOUS_MONGO_BINARY
• LAST_LTS_MONGO_BINARY

The _MONGO_BINARY constants build a generic "mongo" binary that is no longer shipped as a separate artifact (only the mongod/mongos variants are consumed). The _BIN_VERSION constants duplicate the corresponding FCV constants and have no consumers.