Remove the association of a function name with a macro name
Example: (remove-macro-fn binary-append) General Form: (remove-macro-fn macro-fn)
See add-macro-fn for a discussion of how to associate a macro name with a function name. This form sets untrans-table to the result of deleting the association of a macro name with the given binary function name. If the function name has no such association, then this form still generates an event, but the event has no real effect.