Enable Rails/Presence in Rubocop for HAML

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

.haml-lint.yml

@@ -124,7 +124,6 @@ linters:
       - Performance/RedundantMatch
       - Performance/StringReplacement
       - Rails/LinkToBlank
-      - Rails/Presence
       - Rails/RequestReferer
       - Style/ColonMethodCall
       - Style/ConditionalAssignment

app/views/admin/groups/index.html.haml

@@ -5,9 +5,8 @@
     = form_tag admin_groups_path, method: :get, class: 'js-search-form' do |f|
       = hidden_field_tag :sort, @sort
       .search-holder
-        - project_name = params[:name].present? ? params[:name] : nil
         .search-field-holder
-          = search_field_tag :name, project_name, class: "form-control search-text-input js-search-input", autofocus: true, spellcheck: false, placeholder: 'Search by name', data: { qa_selector: 'group_search_field' }
+          = search_field_tag :name, params[:name].presence, class: "form-control search-text-input js-search-input", autofocus: true, spellcheck: false, placeholder: 'Search by name', data: { qa_selector: 'group_search_field' }
           = sprite_icon('search', css_class: 'search-icon')
         = render "shared/groups/dropdown", options_hash: admin_groups_sort_options_hash
         = link_to new_admin_group_path, class: "gl-button btn btn-confirm" do