Manage Delegates in Expenses module

Summary:

Our client wants to limit who can have access in Manage Delegates.

I checked the role and saw the Manage Delegation privilege though it is not added/existing on the custom role. The 'Manage Delegate' is still functioning in Expenses user profile.

Is it possible to restrict the 'Manage Delegation' who can have access only?

or possibility to disable in the setup?

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