NetApp
Configuration : System Tools > Licenses : Managing licenses : Deleting licenses

Deleting licenses
You can use the Licenses window to delete an expired software license. However, you cannot delete the disk sanitization license after it is installed on your system.
Before you begin 
You must have checked the list of required licenses to ensure that the software license you want to delete is not used by other services or features.
Steps 
1.
From the Home tab, double-click the appropriate storage system.
2.
In the navigation pane, click Configuration > System Tools > Licenses to display the Licenses window.
3.
Select the software license that you want to delete, then click Delete.
4.
Select the confirmation check box and click Delete.


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