Fix setup/teardown for Markdown feature spec

Prior, CI seemed to be freezing after running these specs.

spec/features/markdown_spec.rb

@@ -29,22 +29,6 @@ describe 'GitLab Markdown', feature: true do
   include GitlabMarkdownHelper
   include MarkdownMatchers
-  # Let's only parse this thing once
-  before(:all) do
-    @feat = MarkdownFeature.new
-
-    # `gfm_with_options` depends on a `@project` variable
-    @project = @feat.project
-  end
-
-  after(:all) do
-    @feat.teardown
-  end
-
-  def doc(html = @html)
-    Nokogiri::HTML::DocumentFragment.parse(html)
-  end
-
   # Sometimes it can be useful to see the parsed output of the Markdown document
   # for debugging. Call this method to write the output to
   # `tmp/capybara/<filename>.html`.
@@ -54,6 +38,10 @@ describe 'GitLab Markdown', feature: true do
     end
   end
+  def doc(html = @html)
+    Nokogiri::HTML::DocumentFragment.parse(html)
+  end
+
   # Shared behavior that all pipelines should exhibit
   shared_examples 'all pipelines' do
     describe 'Redcarpet extensions' do
@@ -189,6 +177,11 @@ describe 'GitLab Markdown', feature: true do
   context 'default pipeline' do
     before(:all) do
+      @feat = MarkdownFeature.new
+
+      # `gfm_with_options` depends on a `@project` variable
+      @project = @feat.project
+
       @html = markdown(@feat.raw_markdown)
     end

spec/support/markdown_feature.rb

@@ -10,14 +10,6 @@
 class MarkdownFeature
   include FactoryGirl::Syntax::Methods
-  def initialize
-    DatabaseCleaner.start
-  end
-
-  def teardown
-    DatabaseCleaner.clean
-  end
-
   def user
     @user ||= create(:user)
   end