How to bulk delete expressions

[#1]

Is there a way to bulk delete expressions?  I opened the Expression Overview window but I cannot see a way to delete these expressions.

What i am doing is trying to take a current app that has been developed with the colors I like so I am trying to just delete all objects / expressions from it.  Is there a better way?

[#2 · Accepted solution]

once i deleted all the "hidden" sheets containing the objects with expression logic they all were deleted from the Expression Overview window