Remove the "Disable the visual editor when writing" option from user profile

[prasadkarmalkar]

In this PR I have added a condition when displaying the option for 'Disable the visual editor when writing' only when the user has already changed it to checked.
Here is the demo of a user already having the option checked.

Screen.Recording.2024-12-16.at.5.14.49.PM.mov

Trac ticket: https://core.trac.wordpress.org/ticket/34681

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Props prasadkarmalkar.

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[jamieblomerus]

LGTM!

I think it is pretty clear that this one-line change achieves its purpose.