Remove tab navigation from clusters/index

app/views/projects/clusters/_tabs.html.haml

-.top-area.scrolling-tabs-container.inner-page-scroll-tabs
-  .fade-left= icon("angle-left")
-  .fade-right= icon("angle-right")
-  %ul.nav-links.scrolling-tabs
-    %li{ class: ('active' if @scope == 'active') }>
-      = link_to project_clusters_path(@project, scope: :active), class: "js-active-tab" do
-        = s_("ClusterIntegration|Active")
-        %span.badge= @active_count
-    %li{ class: ('active' if @scope == 'inactive') }>
-      = link_to project_clusters_path(@project, scope: :inactive), class: "js-inactive-tab" do
-        = s_("ClusterIntegration|Inactive")
-        %span.badge= @inactive_count
-    %li{ class: ('active' if @scope.nil? || @scope == 'all') }>
-      = link_to project_clusters_path(@project), class: "js-all-tab" do
-        = s_("ClusterIntegration|All")
-        %span.badge= @all_count

app/views/projects/clusters/index.html.haml

@@ -2,8 +2,14 @@
 - page_title "Clusters"
 
 .clusters-container
-  - if !@clusters.empty?
-    = render "tabs"
+  - if @clusters.empty?
+    = render "empty_state"
+  - else
+    .top-area.adjust
+      .nav-text
+        = s_("ClusterIntegration|Control your environments separately by adding multiple clusters to your project")
+      .pull-right.nav-bar-right
+        = link_to s_("ClusterIntegration|Add cluster"), new_project_cluster_path(@project), class: "btn btn-success disabled has-tooltip js-add-cluster", title: s_("ClusterIntegration|Multiple clusters are available in GitLab Entreprise Edition Premium and Ultimate")
     .ci-table.js-clusters-list
       .gl-responsive-table-row.table-row-header{ role: "row" }
         .table-section.section-30{ role: "rowheader" }
@@ -16,9 +22,3 @@
       - @clusters.each do |cluster|
         = render "cluster", cluster: cluster.present(current_user: current_user)
     = paginate @clusters, theme: "gitlab"
-  - elsif @scope == 'all'
-    = render "empty_state"
-  - else
-    = render "tabs"
-    .prepend-top-20.text-center
-      = s_("ClusterIntegration|There are no clusters to show")

spec/features/projects/clusters_spec.rb

@@ -35,17 +35,6 @@ feature 'Clusters', :js do
       expect(page).to have_selector('.gl-responsive-table-row', count: 2)
     end
 
-    it 'user sees navigation tabs' do
-      expect(page.find('.js-active-tab').text).to include('Active')
-      expect(page.find('.js-active-tab .badge').text).to include('1')
-
-      expect(page.find('.js-inactive-tab').text).to include('Inactive')
-      expect(page.find('.js-inactive-tab .badge').text).to include('0')
-
-      expect(page.find('.js-all-tab').text).to include('All')
-      expect(page.find('.js-all-tab .badge').text).to include('1')
-    end
-
     context 'inline update of cluster' do
       it 'user can update cluster' do
         expect(page).to have_selector('.js-toggle-cluster-list')