Revert "Add inverse transition functions for the bool_and and bool_or aggregates."

This reverts commit 121b0823753cedf33bb94f646df3176b77f28500.

Conflicts:
	src/backend/utils/adt/bool.c
Update comment about the check for volatile functions also covers the FILTER(WHERE) clause
Add more documentation to area that explains about user defined aggregates
Fix wording in comment
More doc changes for inverse transition functions