Merge branch 'remove-unused-partial' into 'master'

Remove unused partial

See merge request gitlab-org/gitlab-ce!23180

app/views/shared/_labels_row.html.haml

-- labels.each do |label|
-  %span.label-row.btn-group{ role: "group", aria: { label: label.name }, style: "color: #{text_color_for_bg(label.color)}" }
-    = link_to_label(label, subject: @project, css_class: 'btn btn-transparent')
-    %button.btn.btn-transparent.label-remove.js-label-filter-remove{ type: "button", style: "background-color: #{label.color};", data: { label: label.title } }
-      = icon("times")