Remove email from subject of feedback mail

The mail address of the user sending the feedback is now set in the
Reply-To header of the mail already.

app/mailers/mailer.rb

@@ -64,7 +64,7 @@ class Mailer < ActionMailer::Base
 
     mail to: FoodsoftConfig[:notification][:error_recipients],
          from: user,
-         subject: I18n.t('mailer.feedback.subject', email: user.email)
+         subject: I18n.t('mailer.feedback.subject')
   end
 
   def not_enough_users_assigned(task, user)

config/locales/de.yml

@@ -1169,7 +1169,7 @@ de:
     dateformat: "%d. %b"
     feedback:
       header: "%{user} schrieb am %{date}:"
-      subject: Feedback von %{email}
+      subject: Feedback zur Foodsoft
     invite:
       subject: Einladung in die Foodcoop
       text: |

config/locales/en.yml

@@ -1171,7 +1171,7 @@ en:
     dateformat: "%d %b"
     feedback:
       header: "%{user} wrote at %{date}:"
-      subject: Feedback from %{email}
+      subject: Feedback for Foodsoft
     invite:
       subject: Invitation to the Foodcoop
       text: |

config/locales/fr.yml

@@ -1188,7 +1188,7 @@ fr:
     dateformat: "%d %b"
     feedback:
       header: 'Le %{date}, %{user} a écrit:'
-      subject: Retour de %{email}
+      subject: Feedback pour Foodsoft
     invite:
       subject: Invitation à participer à une Bouffecoop
       text: |-

config/locales/nl.yml

@@ -1171,7 +1171,7 @@ nl:
     dateformat: "%d %b"
     feedback:
       header: "%{user} schreef op %{date}:"
-      subject: Feedback van %{email}
+      subject: Feedback voor Foodsoft
     invite:
       subject: Uitnodiging voor de foodcoop
       text: |-