Fix minor offenses

app/models/project_services/discord_service.rb

@@ -25,10 +25,6 @@ class DiscordService < ChatNotificationService
     </ol>"
   end
 
-  def webhook_placeholder
-    "https://discordapp.com/api/webhooks/..."
-  end
-
   def event_field(event)
     # No-op.
   end
@@ -39,7 +35,7 @@ class DiscordService < ChatNotificationService
 
   def default_fields
     [
-      { type: "text", name: "webhook", placeholder: "e.g. #{webhook_placeholder}" },
+      { type: "text", name: "webhook", placeholder: "e.g. https://discordapp.com/api/webhooks/…" },
       { type: "checkbox", name: "notify_only_broken_pipelines" },
       { type: "checkbox", name: "notify_only_default_branch" }
     ]

spec/models/project_services/discord_service_spec.rb

@@ -3,7 +3,7 @@
 require "spec_helper"
 
 describe DiscordService do
-  it_behaves_like "chat service", "Hangouts Chat" do
+  it_behaves_like "chat service", "Discord notifications" do
     let(:client) { Discordrb::Webhooks::Client }
     let(:client_arguments) { { url: webhook_url } }
     let(:content_key) { :content }