Remove unneccessary crypto using

[marcpopMSFT]

I was hoping there'd be more as we're reviewing all usage of this namespace. Remove this one as it was flagged as unused.

[Copilot]

Pull Request Overview

This PR removes an unused using System.Security.Cryptography; import from the ComputeDotnetBaseImageAndTag.cs file. The change is part of a broader review of cryptography namespace usage across the codebase to clean up unnecessary imports.

• Removes unused using statement for System.Security.Cryptography namespace

Comments suppressed due to low confidence (1)

src/Containers/Microsoft.NET.Build.Containers/Tasks/ComputeDotnetBaseImageAndTag.cs:5

• The PR title contains a spelling error: 'unneccessary' should be 'unnecessary' (one 'c').

using Microsoft.Build.Framework;