The script is available for download from http://gallery.technet.microsoft.com/How-to-remove-a-Stored-ced1038b. You can also use Microsoft Script Browser for Windows PowerShell ISE to download the sample with one button click from within your scripting environment.
This script sample shows how to remove a stored access policy of a container in Microsoft Azure.
A stored access policy gives users greater control over shared access signatures we have released. If they want to revoke access within a specified time of period, a simply way is to remove the underlying container-level policy. This script can remove the stored access policy easily.
You can find more All-In-One Script Framework script samples at https://aka.ms/onescriptingallery