Revert "Update class-wp-json-users.php"

This reverts commit 235fa467fe9b5b047f436f1c338f7d0369abd519.
Revert "Update class-wp-json-server.php"

This reverts commit 31fae1c7fa25fd7b7e872943e5cf02e819e5f6b5.
Revert "Update class-wp-json-posts.php"

This reverts commit d792e8ead12ff5c9e90ad90b811fdf0baf1730fb.