AFAIK, there is no such guide which defines the list of obsolete tables/fields. At max you can go with Table Sharing Guide which gives you the table sets but not sure if that would help.
You just have to dig in to the system to check the tables and fields. If any doubts, you can always post your questions on the Board or go for Infor Support.
Unless you try to do something beyond what you have already mastered, you will never grow!