I was looking at this and discovered the work we did on removing FCKeditor is not in the core. We had intended that to be in the 1.4.4 release.
https://github.com/ImpressCMS/impresscms/pull/833
It might have gotten missed - somehow I was working in your repository - https://github.com/fiammybe/impresscms/tree/branches/1.4_fckeditor_warning
Should we wedge this in and apply the same methodology for TinyMCE?
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