If you read, you’ll see that the nightclub’s restrooms were downstairs...She had been carried down to use the restroom...The wheelchair was sitting there awaiting her return...
The wheelchair apparently belonged to a disabled young woman, who is also a student at the university, and she had to be carried down the stairs afterward to use the bathroom.
The article makes it sound like she had to be carried down the stairs BECAUSE the wheelchair was removed, not BEFORE it was removed.