Remove duplicated BS display properties from Merge Request title

Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

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

@@ -25,10 +25,10 @@
 
   .detail-page-header-actions.js-issuable-actions
     .clearfix.issue-btn-group.dropdown
-      %button.btn.btn-default.float-left.d-md-none.d-lg-none.d-xl-none{ type: "button", data: { toggle: "dropdown" } }
+      %button.btn.btn-default.float-left.d-md-none{ type: "button", data: { toggle: "dropdown" } }
         Options
         = icon('caret-down')
-      .dropdown-menu.dropdown-menu-right.d-lg-none.d-xl-none
+      .dropdown-menu.dropdown-menu-right
         %ul
           - if can_update_merge_request
             %li= link_to 'Edit', edit_namespace_project_merge_request_path(@project.namespace, @project, @merge_request)
@@ -45,6 +45,6 @@
             %li= link_to 'Report abuse', new_abuse_report_path(user_id: @merge_request.author.id, ref_url: merge_request_url(@merge_request))
 
       - if can_update_merge_request
-        = link_to 'Edit', edit_project_merge_request_path(@project, @merge_request), class: "d-none d-sm-none d-md-block btn gl-button btn-grouped js-issuable-edit qa-edit-button"
+        = link_to 'Edit', edit_project_merge_request_path(@project, @merge_request), class: "d-none d-md-block btn gl-button btn-grouped js-issuable-edit qa-edit-button"
 
       = render 'shared/issuable/close_reopen_button', issuable: @merge_request, can_update: can_update_merge_request, can_reopen: can_reopen_merge_request

changelogs/unreleased/270065-bs4-optimization-mr.yml

+---
+title: Remove duplicated BS display properties from Merge Request title
+merge_request: 47124
+author: Takuya Noguchi
+type: other