De-duplicate two specs in spec/services/notification_service_spec

There were two specs that were testing the exact same thing as the spec
above it, but with additional expectations. So we opted to keep the
"more expectations" tests and deleted the duplicates.

We've also deleted one nested `before` block that was duplicating setup
of its parent context.

spec/services/notification_service_spec.rb

@@ -694,17 +694,6 @@ describe NotificationService do
       let!(:subscriber_to_label_1) { create(:user) { |u| label_1.toggle_subscription(u, project) } }
       let!(:subscriber_to_label_2) { create(:user) { |u| label_2.toggle_subscription(u, project) } }
 
-      it "emails subscribers of the issue's added labels only" do
-        notification.relabeled_issue(issue, [group_label_2, label_2], @u_disabled)
-
-        should_not_email(subscriber_to_label_1)
-        should_not_email(subscriber_to_group_label_1)
-        should_not_email(subscriber_to_group_label_2_on_another_project)
-        should_email(subscriber_1_to_group_label_2)
-        should_email(subscriber_2_to_group_label_2)
-        should_email(subscriber_to_label_2)
-      end
-
       it "emails the current user if they've opted into notifications about their activity" do
         subscriber_to_label_2.notified_of_own_activity = true
         notification.relabeled_issue(issue, [group_label_2, label_2], subscriber_to_label_2)
@@ -721,6 +710,12 @@ describe NotificationService do
       it "doesn't send email to anyone but subscribers of the given labels" do
         notification.relabeled_issue(issue, [group_label_2, label_2], @u_disabled)
 
+        should_not_email(subscriber_to_label_1)
+        should_not_email(subscriber_to_group_label_1)
+        should_not_email(subscriber_to_group_label_2_on_another_project)
+        should_email(subscriber_1_to_group_label_2)
+        should_email(subscriber_2_to_group_label_2)
+        should_email(subscriber_to_label_2)
         should_not_email(issue.assignees.first)
         should_not_email(issue.author)
         should_not_email(@u_watcher)
@@ -730,12 +725,6 @@ describe NotificationService do
         should_not_email(@watcher_and_subscriber)
         should_not_email(@unsubscriber)
         should_not_email(@u_participating)
-        should_not_email(subscriber_to_label_1)
-        should_not_email(subscriber_to_group_label_1)
-        should_not_email(subscriber_to_group_label_2_on_another_project)
-        should_email(subscriber_1_to_group_label_2)
-        should_email(subscriber_2_to_group_label_2)
-        should_email(subscriber_to_label_2)
       end
 
       context 'confidential issues' do
@@ -878,11 +867,6 @@ describe NotificationService do
     end
 
     describe '#new_merge_request' do
-      before do
-        update_custom_notification(:new_merge_request, @u_guest_custom, resource: project)
-        update_custom_notification(:new_merge_request, @u_custom_global)
-      end
-
       it do
         notification.new_merge_request(merge_request, @u_disabled)
 
@@ -1008,7 +992,7 @@ describe NotificationService do
       let!(:subscriber_to_label_1) { create(:user) { |u| label_1.toggle_subscription(u, project) } }
       let!(:subscriber_to_label_2) { create(:user) { |u| label_2.toggle_subscription(u, project) } }
 
-      it "emails subscribers of the merge request's added labels only" do
+      it "doesn't send email to anyone but subscribers of the given labels" do
         notification.relabeled_merge_request(merge_request, [group_label_2, label_2], @u_disabled)
 
         should_not_email(subscriber_to_label_1)
@@ -1017,11 +1001,6 @@ describe NotificationService do
         should_email(subscriber_1_to_group_label_2)
         should_email(subscriber_2_to_group_label_2)
         should_email(subscriber_to_label_2)
-      end
-
-      it "doesn't send email to anyone but subscribers of the given labels" do
-        notification.relabeled_merge_request(merge_request, [group_label_2, label_2], @u_disabled)
-
         should_not_email(merge_request.assignee)
         should_not_email(merge_request.author)
         should_not_email(@u_watcher)
@@ -1031,12 +1010,6 @@ describe NotificationService do
         should_not_email(@unsubscriber)
         should_not_email(@u_participating)
         should_not_email(@u_lazy_participant)
-        should_not_email(subscriber_to_label_1)
-        should_not_email(subscriber_to_group_label_1)
-        should_not_email(subscriber_to_group_label_2_on_another_project)
-        should_email(subscriber_1_to_group_label_2)
-        should_email(subscriber_2_to_group_label_2)
-        should_email(subscriber_to_label_2)
       end
     end
 
@@ -1081,12 +1054,12 @@ describe NotificationService do
 
         should_email(merge_request.assignee)
         should_email(@u_watcher)
+        should_email(@u_guest_watcher)
+        should_email(@u_guest_custom)
+        should_email(@u_custom_global)
         should_email(@u_participant_mentioned)
         should_email(@subscriber)
         should_email(@watcher_and_subscriber)
-        should_email(@u_guest_watcher)
-        should_email(@u_custom_global)
-        should_email(@u_guest_custom)
         should_not_email(@unsubscriber)
         should_not_email(@u_participating)
         should_not_email(@u_disabled)