Remove unnecessary translation changes

config/locales/app.admin.de.yml

@@ -823,7 +823,6 @@ de:
         search_for_an_user: "Nach einem Benutzer suchen"
         add_a_new_member: "Neues Mitglied hinzufügen"
         reservations: "Reservierungen"
-        username: "Username"
         surname: "Nachname"
         first_name: "Vorname"
         email: "E-Mail"

config/locales/app.admin.es.yml

@@ -823,7 +823,6 @@ es:
         search_for_an_user: "Buscar un usuario"
         add_a_new_member: "Añadir un nuevo miembro"
         reservations: "Reservas"
-        username: "Username"
         surname: "Last name"
         first_name: "First name"
         email: "Email"

config/locales/app.admin.fr.yml

@@ -823,7 +823,6 @@ fr:
         search_for_an_user: "Recherchez un utilisateur"
         add_a_new_member: "Ajouter un nouveau membre"
         reservations: "Réservations"
-        username: "Username"
         surname: "Nom"
         first_name: "Prénom"
         email: "Courriel"

config/locales/app.admin.no.yml

@@ -823,7 +823,6 @@
         search_for_an_user: "Søk etter bruker"
         add_a_new_member: "Legge til nytt medlem"
         reservations: "Reservasjoner"
-        username: "Username"
         surname: "Etternavn"
         first_name: "Fornavn"
         email: "E-post"

config/locales/app.admin.pt.yml

@@ -823,7 +823,6 @@ pt:
         search_for_an_user: "Buscar por usuário"
         add_a_new_member: "Adicionar novo membro"
         reservations: "Reservas"
-        username: "Username"
         surname: "Sobrenome"
         first_name: "Primeiro nome"
         email: "Email"

config/locales/app.admin.zu.yml

@@ -823,7 +823,6 @@ zu:
         search_for_an_user: "crwdns7741:0crwdne7741:0"
         add_a_new_member: "crwdns7743:0crwdne7743:0"
         reservations: "crwdns7745:0crwdne7745:0"
-        username: "Username"
         surname: "crwdns7747:0crwdne7747:0"
         first_name: "crwdns7749:0crwdne7749:0"
         email: "crwdns7751:0crwdne7751:0"