Fix privileges cannot be unset

[tylerjmchugh]

Currently privileges cannot be unset from the Manage Record > Privileges UI.

The issue occurs when list of operations to exclude from deletion is empty. Passing an empty list seems to cause no operations to be deleted instead of all operations for certain database types. H2 does not have this issue however PostgreSQL does.

This PR aims to fix this issue by deleting all operations when the excludes list is empty instead of passing the empty list.

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[josegar74]

I can reproduce the issue, tested the fix with H2 and Postgres and both seem fine.