Remove error for @typescript-eslint/no-namespace

[szhu]

Fixes#7651

Haven't tested it yet, if someone can do that then that would be great!

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[stale]

This pull request has been automatically marked as stale because it has not had any recent activity. It will be closed in 5 days if no further activity occurs.

[mrmckeb]

@heyimalex can you please take a look at this one? Looks good to me, based on the conversation you had in the related issue.

[heyimalex]

Double checked that the typescript test works with declare, fails without declare, which is what you would expect. This is good to go.

[szhu]

Great, thank you! I don't see a merge button -- let me know if anything else is needed on my end to merge this.

[szhu]

Hey @heyimalex, just wanted to check in again to see if there is any action waiting on me before this is merged.