Delete outdated base_mailer_decorator.from_address (it used old MailM…

…ethod). This way we rely on the correct spree base_mailer.from_address (that gets it from Spree::Config

app/mailers/spree/base_mailer_decorator.rb

@@ -7,13 +7,6 @@
 
   protected
 
-  # This method copies the one defined in Spree's mailers. It should be removed
-  # once in Spree v2.0 and Spree's BaseMailer class lands in our codebase.
-  # Then, we'll be able to rely on its #from_address.
-  def from_address
-    Spree::MailMethod.current.preferred_mails_from
-  end
-
   def roadie_options
     # This lets us specify assets using relative paths in email templates
     super.merge(url_options: {host: URI(spree.root_url).host })