@classmethod<EOL><INDENT>def unregister_term_class(cls, term_name):<DEDENT>
try:<EOL><INDENT>del cls.term_classes[term_name.lower()]<EOL><DEDENT>except KeyError:<EOL><INDENT>pass<EOL><DEDENT>
Remove a registration previously made with :py:method:`TermParser.register_term_class`

:param term_name: Fully-qualified term name. Will be converted to lowercase.
:return: