[lang] remove 'Universal' (All) language

This is in accordance with the backend removal performed here:
gargantext/haskell-gargantext!261

src/Gargantext/Components/Lang.purs

@@ -19,8 +19,7 @@ here = R2.here "Gargantext.Components.Lang"
 
 -- Language used for search
 allLangs :: Array Lang
-allLangs = [ Universal
-           , No_extraction
+allLangs = [ No_extraction
            , DE
            , EL
            , EN
@@ -50,7 +49,6 @@ derive instance Generic Lang _
 derive instance Ord Lang
 
 instance Show Lang where
-  show Universal     = "All"
   show No_extraction = "Nothing"
   show s             = genericShow s