How to remove ''Manage Assets'' task from Custom role?

Summary:

How to remove ''Manage Assets'' task from Custom role?

Content (required):

Hi,

I created custom role for maintenance users but i need to remove ''Manage Assets'' task form this role,What is the privilige name of this task,kindly advise.

Regards

Version (include the version you are using, if applicable):

21 C

Code Snippet (add any code snippets that support your topic, if applicable):