remove unnecessary cleanup before running the specs

spec/controllers/news/comments_controller_spec.rb

@@ -35,9 +35,6 @@ describe News::CommentsController do
   let(:news) { FactoryGirl.create(:news)    }
 
   before do
-    User.delete_all
-    News.delete_all
-
     User.stubs(:current).returns user
   end
 

spec/controllers/news_controller_spec.rb

@@ -38,10 +38,6 @@ describe NewsController do
   let(:news)    { FactoryGirl.create(:news)    }
 
   before do
-    User.delete_all
-    News.delete_all
-    Project.delete_all
-
     User.stubs(:current).returns user
   end
 

spec/models/news_spec.rb

@@ -32,11 +32,6 @@ require File.expand_path('../../support/shared/become_member', __FILE__)
 describe News do
   include BecomeMember
 
-  before do
-    Project.delete_all
-    News.delete_all
-  end
-
   let(:project) {
     project = FactoryGirl.create(:project)
     project.enabled_modules << EnabledModule.new(name: 'news')