provider: clean up translations

packages/provider/src/i18n/de/translation.json

 {
-  "de": "Deutsch",
-  "en": "Englisch",
-
   "demo": {
     "provider": "Anbieter",
     "consumer": "Verbraucher",
@@ -13,4 +10,4 @@
     "price": "Preis",
     "sum": "Summe"
   }
-}
\ No newline at end of file
+}

packages/provider/src/i18n/en/translation.json

 {
-  "de": "German",
-  "en": "English",
-
   "demo": {
     "provider": "Provider",
     "consumer": "Consumer",
@@ -13,4 +10,4 @@
     "price": "Price",
     "sum": "sum"
   }
-}
\ No newline at end of file
+}