Remove files added for GitPod.

These aren't available on the upstream master yet, and were added by accident.

app/views/projects/project_members/import.html.haml

@@ -11,5 +11,5 @@
     .col-sm-10= select_tag(:source_project_id, options_from_collection_for_select(@projects, :id, :name_with_namespace), prompt: "Select project", class: "select2 lg", required: true)
 
   .form-actions
-    = button_tag _('Import project members'), class: "btn btn-success"
-    = link_to _("Cancel"), project_project_members_path(@project), class: "btn btn-cancel"
+    = button_tag _('Import project members'), class: "btn gl-button btn-success"
+    = link_to _("Cancel"), project_project_members_path(@project), class: "btn gl-button btn-cancel"

changelogs/unreleased/231072-project-members-import-button.yml

+---
+title: Add gl-button class to import and cancel buttons for project member import page
+merge_request: 43620
+author: Gary Bell @garybell
+type: other