Remove activity observer specs

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

spec/observers/activity_observer_spec.rb

-require 'spec_helper'
-
-describe ActivityObserver do
-  let(:project)  { create(:project) }
-
-  before { Thread.current[:current_user] = create(:user) }
-
-  def self.it_should_be_valid_event
-    it { @event.should_not be_nil }
-    it { @event.project.should == project }
-  end
-
-  describe "Issue created" do
-    before do
-      Issue.observers.enable :activity_observer do
-        @issue = create(:issue, project: project)
-        @event = Event.last
-      end
-    end
-
-    it_should_be_valid_event
-    it { @event.action.should == Event::CREATED }
-    it { @event.target.should == @issue }
-  end
-
-  describe "Issue commented" do
-    before do
-      Note.observers.enable :activity_observer do
-        @issue = create(:issue, project: project)
-        @note = create(:note, noteable: @issue, project: project, author: @issue.author)
-        @event = Event.last
-      end
-    end
-
-    it_should_be_valid_event
-    it { @event.action.should == Event::COMMENTED }
-    it { @event.target.should == @note }
-  end
-
-  describe "Ignore system notes" do
-    let(:author) { create(:user) }
-    let!(:issue) { create(:issue, project: project) }
-    let!(:other) { create(:issue) }
-
-    it "should not create events for status change notes" do
-      expect do
-        Note.observers.enable :activity_observer do
-          Note.create_status_change_note(issue, project, author, 'reopened', nil)
-        end
-      end.to_not change { Event.count }
-    end
-
-    it "should not create events for cross-reference notes" do
-      expect do
-        Note.observers.enable :activity_observer do
-          Note.create_cross_reference_note(issue, other, author, issue.project)
-        end
-      end.to_not change { Event.count }
-    end
-  end
-end