Fixed some HAML errors on milestone#show

The issuable reference wasn't correctly rendered on the page

2 counts where rendered in the top bar of the panel

app/views/shared/milestones/_issuable.html.haml

@@ -16,7 +16,7 @@
     = link_to_gfm issuable.title, [project.namespace.becomes(Namespace), project, issuable], title: issuable.title
   .issuable-detail
     = link_to [project.namespace.becomes(Namespace), project, issuable] do
-      %span.issuable-number >= issuable.to_reference
+      %span.issuable-number= issuable.to_reference
     - issuable.labels.each do |label|
       = link_to polymorphic_path(base_url_args, { milestone_title: @milestone.title, label_name: label.title, state: 'all' }) do

app/views/shared/milestones/_issuables.html.haml

@@ -7,8 +7,6 @@
     .left
       = title
     - if show_counter
-      .right
-        = issuables.size
       .pull-right= number_with_delimiter(issuables.size)
   - class_prefix = dom_class(issuables).pluralize