Remove TEXT AREA in new-post / post-edit

Hy,
I use lots of custom fields with MORE FIELDS Plugin.

So, I want to remove text area in writing posts.
I know I can disable/delete TINYMCE editor, BUT I also want to remove/hide/disable PLAIN TEXT EDITOR.

I know it sound strange, but I’m making website where people will be able to post free and I want to keep some order on website.

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I try to comment next line in wp-admin/post-new.php:
//wp_enqueue_script('editor');
But that doesn’t work because I use QTranslate plugin and when I comment that line I DON’T have MULTIPLE TITLES when writing posts.
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Thanks