Remove assignee/milestone selects from MR form

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

app/views/projects/merge_requests/_form.html.haml

-- if @repository.contribution_guide && !@merge_request.persisted?
-  - contribution_guide_url = project_blob_path(@project, tree_join(@repository.root_ref, @repository.contribution_guide.name))
-  .alert.alert-info.col-sm-10.col-sm-offset-2
-    ="Please review the <strong>#{link_to "guidelines for contribution", contribution_guide_url}</strong> to this repository.".html_safe
 = form_for [@project, @merge_request], html: { class: "merge-request-form form-horizontal" } do |f|
-  -if @merge_request.errors.any?
-    .alert.alert-danger
-      %ul
-        - @merge_request.errors.full_messages.each do |msg|
-          %li= msg
+  .row
+    .col-sm-2
+    .col-sm-10
+      - if @repository.contribution_guide && !@merge_request.persisted?
+        - contribution_guide_url = project_blob_path(@project, tree_join(@repository.root_ref, @repository.contribution_guide.name))
+        .alert.alert-info
+          Please review the
+          %strong #{link_to "guidelines for contribution", contribution_guide_url}
+          to this repository.
+
+      -if @merge_request.errors.any?
+        .alert.alert-danger
+          - @merge_request.errors.full_messages.each do |msg|
+            %div= msg
 
   .merge-request-branches
     .form-group
@@ -47,24 +52,6 @@
         = f.text_area :description, class: "form-control js-gfm-input", rows: 14
         %p.hint Description is parsed with #{link_to "GitLab Flavored Markdown", help_markdown_path, target: '_blank'}.
 
-    %hr
-    .form-group
-      .merge-request-assignee
-        = f.label :assignee_id, class: 'control-label' do
-          %i.icon-user
-          Assign to
-        .col-sm-10
-          = project_users_select_tag('merge_request[assignee_id]', placeholder: 'Select a user', class: 'custom-form-control', selected: @merge_request.assignee_id)
-          &nbsp;
-          = link_to 'Assign to me', '#', class: 'btn btn-small assign-to-me-link'
-    .form-group
-      .merge-request-milestone
-        = f.label :milestone_id, class: 'control-label' do
-          %i.icon-time
-          Milestone
-        .col-sm-10= f.select(:milestone_id, milestone_options(@merge_request), { include_blank: "Select milestone" }, {class: 'select2'})
-
-
   .form-actions
     - if @merge_request.new_record?
       = f.submit 'Submit merge request', class: "btn btn-create"
@@ -96,7 +83,3 @@
   target_branch.on("change", function() {
     $.get("#{branch_to_project_merge_requests_path(@source_project)}", {target_project_id: target_project.val(),ref: $(this).val() });
   });
-  $('.assign-to-me-link').on('click', function(e){
-    $('#merge_request_assignee_id').val("#{current_user.id}").trigger("change");
-    e.preventDefault();
-  });