Remove recreated mailer controller for admin

app/controllers/admin/mailer_controller.rb

-class Admin::MailerController < ApplicationController
-  layout "admin"
-  before_filter :authenticate_user!
-  before_filter :authenticate_admin!
-
-  def preview
-
-  end
-
-  def preview_note
-    @note = Note.first
-    @user = @note.author
-    @project = @note.project
-    case params[:type]
-    when "Commit" then
-      @commit = @project.commit
-      render :file => 'notify/note_commit_email', :layout => 'notify'
-    when "Issue" then
-      @issue = Issue.first
-      render :file => 'notify/note_issue_email', :layout => 'notify'
-    when "Wiki" then
-      render :file => 'notify/note_wiki_email', :layout => 'notify'
-    else
-      render :file => 'notify/note_wall_email', :layout => 'notify'
-    end
-  rescue
-    render :text => "Preview not available"
-  end
-
-  def preview_user_new
-    @user = User.first
-    @password = "DHasJKDHAS!"
-
-    render :file => 'notify/new_user_email', :layout => 'notify'
-  rescue
-    render :text => "Preview not available"
-  end
-
-  def preview_issue_new
-    @issue = Issue.first
-    @user = @issue.assignee
-    @project = @issue.project
-    render :file => 'notify/new_issue_email', :layout => 'notify'
-  rescue
-    render :text => "Preview not available"
-  end
-end