Revert of Import wpt@a99ba661fff2fb129894bdff21d63814d9b3f7e9

third_party/WebKit/LayoutTests/imported/wpt/custom-elements/resources/custom-elements-helpers.js

Index: third_party/WebKit/LayoutTests/imported/wpt/custom-elements/resources/custom-elements-helpers.js
diff --git a/third_party/WebKit/LayoutTests/imported/wpt/custom-elements/resources/custom-elements-helpers.js b/third_party/WebKit/LayoutTests/imported/wpt/custom-elements/resources/custom-elements-helpers.js
index 956c562a76a2883c35281d19030a8f52028871c9..20ae66b4fae6b64f5de4a501098daeb76a0698d0 100644
--- a/third_party/WebKit/LayoutTests/imported/wpt/custom-elements/resources/custom-elements-helpers.js
+++ b/third_party/WebKit/LayoutTests/imported/wpt/custom-elements/resources/custom-elements-helpers.js
@@ -77,15 +77,6 @@
 function assert_disconnected_log_entry(log, element) {
     assert_equals(log.type, 'disconnected');
     assert_equals(log.element, element);
-}
-
-function assert_adopted_log_entry(log, element) {
-    assert_equals(log.type, 'adopted');
-    assert_equals(log.element, element);
-}
-
-function create_adopted_callback_log(element) {
-    return {type: 'adopted', element: element};
 }
 
 function create_attribute_changed_callback_log(element, name, oldValue, newValue, namespace) {