Remove redundant version of eval_procedure
Remove unused stuff
Remove set_bindings
Remove some use of variable_unifier
Remove some use of unifiers from the embodiment combo interpreter
Remove test for function I just removed
remove calls to the old duplicate eval system that supported unifiers
Embodiment doesn't use the old Combo interpreter
Remove vestiges of the old embodiment-specific combo eval functions
Remove the now-unneeded Evaluator hackclass
Merge combo-actions