deprecated Searchable abstraction

Summary: Since the functionality is now available as part of DataTable, the HoC doesn't seem to be needed as generic abstraction. it is used in handful places outside datatable / datalist, but those can be localized in the future or should datatable / datalist.

Reviewed By: fabiomassimo

Differential Revision: D28993836

fbshipit-source-id: 3e6da7c7b48348faa0c4f7281868196f5585a065

website/sidebars.js

@@ -120,7 +120,6 @@ module.exports = {
     'Desktop plugin APIs': [
       'extending/flipper-plugin',
       'extending/styling-components',
-      'extending/search-and-filter',
       ...fbInternalOnly([
         {
           'QPL linting': ['fb/building-a-linter', 'fb/active-linters'],
@@ -131,6 +130,7 @@ module.exports = {
           'extending/ui-components',
           'extending/js-plugin-api',
           'extending/create-table-plugin',
+          'extending/search-and-filter',
         ],
       },
     ],