Revert "create "design" subcategory for "dev""

This reverts commit f0baa615cb.

categories.toml

@@ -49,25 +49,25 @@ description.it = "Siti web, blog, wiki, CMS…"
     title.es = "Paginas web"
     title.fr = "Site web"
     title.it = "Siti web"
-
+    
     [publishing.subtags.blog]
     title.en = "Blog"
     title.es = "blog"
     title.fr = "Blog"
     title.it = "Blog"
-
+    
     [publishing.subtags.wiki]
     title.en = "Wiki"
     title.es = "Wiki"
     title.fr = "Wiki"
     title.it = "Wiki"
-
+    
     [publishing.subtags.ecommerce]
     title.en = "E-commerce"
     title.es = "Comercio eletronico"
     title.fr = "Vente en ligne"
     title.it = "Vendite online"
-
+    
     [publishing.subtags.analytics]
     title.en = "Analytics"
     title.es = "Estadisticas"
@@ -90,19 +90,19 @@ description.it = "Messaggistica, posta elettronica, forum, riunioni…"
     title.es = "Mensajeria Instantanea"
     title.fr = "Messagerie instantannée"
     title.it = "Messaggistica istantanea"
-
+    
     [communication.subtags.forum]
     title.en = "Forum"
     title.es = "Foro"
     title.fr = "Forum"
     title.it = "Forum"
-
+    
     [communication.subtags.email]
     title.en = "Email"
     title.es = "Email"
     title.fr = "Email"
     title.it = "Posta elettronica"
-
+    
     [communication.subtags.meeting]
     title.en = "Meetings"
     title.es = "Reuniones"
@@ -322,11 +322,6 @@ description.it = "Forge Git, schematizzazione di applicazioni, CI, traduzioni…
     title.fr = "Programmation"
     title.it = "Programmazione"
 
-    [dev.subtags.design]
-    title.en = "Design"
-    title.fr = "Design"
-    title.it = "Progettazione"
-
 [system_tools]
 icon = "wrench"
 title.en = "System tools"