NAV 4.00 Delete tables via code.

Hi,
I have 2 questions:

1. Is there any quick way to delete the tables (incluing data) via code quickly? I need to remove some specific range of tables quickly.
2. Is there any quick way to remove specific fields while importing fob which are no more? Like Force in schema synchronization in NAV 2015 onwards.

Looking forward to hear from you.