Fixed step definitions to properly remove professors in previous cucumber scenario
Fixed step definitions to properly remove professors in previous cucumber scenario

MarcusLee143/CS169_Great_Course_Guide,MarcusLee143/CS169_Great_Course_Guide,MarcusLee143/CS169_Great_Course_Guide,MarcusLee143/CS169_Great_Course_Guide,MarcusLee143/CS169_Great_Course_Guide