only put heavy components if truly needed

src/services/theme_data/theme2_to_theme3.js

@@ -244,9 +244,6 @@ export const convertTheme2To3 = (data) => {
         case 'tooltip':
           rule.component = 'Popover'
           break
-        case 'attachment':
-          rule.component = 'Attachment'
-          break
         case 'ChatMessage':
           rule.component = 'Button'
           break

src/services/theme_data/theme_data_3.service.js

@@ -33,7 +33,6 @@ const components = {
   Icon: null,
   Border: null,
   PanelHeader: null,
-  Attachment: null,
   Panel: null,
   Chat: null,
   ChatMessage: null,