There’s at least 2 ways to remove the visual ( TinyMce Rich ) Editor from WordPress.
Firstly, here’s the before and after shots showing the visual and text editor enabled:
And what the editor looks like when you disable or remove the visual editor and leave only the text editor:
The 1st method is simple. Go to Users > Your Profile and check the box to disable the visual editor.
This only works for you as the user and other users will need to manually disable the visual editor themselves.
The 2nd & 3rd methods enable you to remove the TinyMce Rich Editor using code in your child themes functions file.
You can also use this code to disable the visual editor for specific users and specific roles & capabilities.
Here’s the code for members: