update: remoe metadata cleaner

docs/data-redaction.md

@@ -26,8 +26,6 @@ You should **never** use blur to redact [text in images](https://bishopfox.com/b
 
 **MAT2** is free, cross-platform software which allows you to remove metadata from image, audio, torrent, and document file types. It provides both a command line tool and a graphical user interface via an extension for [Dolphin](https://0xacab.org/jvoisin/mat2/-/tree/master/dolphin), the default file manager of [KDE](https://kde.org).
 
-On Linux, you can use [Metadata Cleaner](https://gitlab.com/rmnvgr/metadata-cleaner), a third-party graphical tool powered by MAT2 that's [available on Flathub](https://flathub.org/apps/details/fr.romainvigier.MetadataCleaner).
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 [:octicons-repo-16: Repository](https://0xacab.org/jvoisin/mat2){ .md-button .md-button--primary }
 [:octicons-info-16:](https://0xacab.org/jvoisin/mat2/-/blob/master/README.md){ .card-link title="Documentation" }
 [:octicons-code-16:](https://0xacab.org/jvoisin/mat2){ .card-link title="Source Code" }