[4.0] Uncaught TypeError in mobile view if article is open

[dgrammatiko]

Pull Request for Issue #34330

Summary of Changes

• Remove a class

Testing Instructions

follow the issue instructions

Actual result BEFORE applying this Pull Request

Expected result AFTER applying this Pull Request

Documentation Changes Required

[brianteeman]

I have tested this item ✅ successfully on 4892c7e

Can also be tested without any emulator on a regular browser with a width of less than about 700px

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[RickR2H]

I have tested this item ✅ successfully on 4892c7e

Testen on Chrome with mobile layout.

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[richard67]

RTC

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[wilsonge]

Thanks!