Remove unused mailer

app/mailers/user_mailer.rb

@@ -1,15 +0,0 @@
-class UserMailer < ActionMailer::Base
-  default :from => "asciinema <hello@asciinema.org>"
-  helper :application
-
-  def new_comment_email(user, comment)
-    @comment = comment
-    @author = UserDecorator.new(comment.user)
-    @asciicast = AsciicastDecorator.new(@comment.asciicast)
-
-    user = UserDecorator.new(user)
-    to = "#{user.nickname} <#{user.email}>"
-    subject = %(New comment for #{@asciicast.title})
-    mail :to => to, :subject => subject
-  end
-end

app/views/user_mailer/new_comment_email.text.erb

@@ -1,8 +0,0 @@
-Howdy!
-
-<%= @author.nickname %> (<%= profile_url(@author) %>) commented on your asciicast "<%= @asciicast.title %>":
-
-<%= indented_text @comment.body, 4 %>
-
----
-http://asciinema.org/

spec/mailers/user_mailer_spec.rb

@@ -1,5 +0,0 @@
-require "spec_helper"
-
-describe UserMailer do
-  pending "add some examples to (or delete) #{__FILE__}"
-end