Revert "Workaround a C++/CLI bug involving DIMs (#89253)"

[tannergooding]

This reverts commit 812492e.

This brings back in the expected support now that the C++/CLI fix is available in VS 17.8 Preview 2

[dotnet-issue-labeler]

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Issue Details

---

This reverts commit 812492e.

This brings back in the expected support now that the C++/CLI fix is available in VS 17.8 Preview 2

Author:	tannergooding
Assignees:	tannergooding
Labels:	area-System.Numerics, new-api-needs-documentation
Milestone:	-

[tannergooding]

CC. @jeffhandley, @stephentoub

[jeffhandley]

🎉 Great!

I'd like to get @mmitche or @marcpopMSFT to approve as well and give the green light on this merging into main and getting backported to RC2, with their affirmation that this won't trip up code flow to any repositories. I'll ping them in the appropriate channel to request they review.

[jeffhandley]

We don't yet have VS 17.8 Preview 2 in place across our infrastructure, so this can't be merged into main yet, and we won't be able to accept this into RC2. The fix will have to wait for the GA milestone once that VS version flows through the queues.

[jeffhandley]

VS 17.8.0 Preview 2 is now rolled out in the images that are used by dotnet/wpf. This PR is unblocked, can be merged into main, and then backported to release/8.0.

[jeffhandley]

/backport to release/8.0

[github-actions]

Started backporting to release/8.0: https://github.com/dotnet/runtime/actions/runs/6564901021