Revert "'Monticello.v3-topa.479' message 'Optionalize traits in MCClassDefinition>>#= trying to make loading possible.'"

This reverts commit c1a00441334d50ded6d97caa58065024c90e1da7.
'BaselineOfGLASS1-topa.6' message 'Try to prime Monticello when we have to load traits'