Remove unused imports in MFA

[nikosdion]

Pull Request for Issue #38483 .

Summary of Changes

Removes unnecessary imports in com_users classes and view templates touched by the MFA feature.

This is a code quality PR @HLeithner @roland-d

Testing Instructions

Install a site and use the MFA feature.

Actual result BEFORE applying this Pull Request

Everything works.

Expected result AFTER applying this Pull Request

Everything still works.

Documentation Changes Required

None.

[HLeithner]

Thanks but I think @fancyFranci should be mentioned here as release lead. Would expect that get merged after we have a stable 4.2 release.

[nikosdion]

Thanks! I didn't have both their GitHub handles :)

[brianteeman]

Thanks @nikosdion I was a bit scared to rely on my ide without fully understanding it to create the pr myself

[brianteeman]

I have tested this item ✅ successfully on 53567ab

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[nikosdion]

@brianteeman You're welcome! This was easy for me, I could even tell why these use statements were left behind. I had started this as a standalone component, moved it to a com_users feature then went into two major refactoring rounds. The leftovers were indeed from the three refactoring rounds.

[viocassel]

I have tested this item ✅ successfully on 53567ab

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[roland-d]

Thank you