[CodeHealth] Misc cleanup in PointerEvent wpts (#48983)

This is a no-op change to remove a few unused methods/features.

Change-Id: I5406533f119c052bfe63f7fffdd17e9d828b7964
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5989014
Commit-Queue: Mustaq Ahmed <[email protected]>
Reviewed-by: Kevin Ellis <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1378549}

Co-authored-by: Mustaq Ahmed <[email protected]>

pointerevents/pointerevent_after_target_removed.html

@@ -44,7 +44,7 @@
   }
 
   function removeChild() {
-    parent.removeChild(child);
+    child.remove();
     event_log.push("(child-removed)");
   }
 

pointerevents/pointerevent_pointer_boundary_events_after_removing_last_over_element.html

@@ -62,7 +62,7 @@
           if (event.target == node) {
             events.push({type: event.type, target: event.target});
           }
-        }, {capture: true});
+        });
       }
     }
     div3.addEventListener("click", event => {

pointerevents/pointerevent_support.js

@@ -170,27 +170,6 @@ function updateDescriptionComplete() {
   document.getElementById('desc').innerHTML = "Test Description: Test complete";
 }
 
-function updateDescriptionSecondStepTouchActionElement(target, scrollReturnInterval) {
-  window.step_timeout(function() {
-  objectScroller(target, 'up', 0);}
-  , scrollReturnInterval);
-  document.getElementById('desc').innerHTML = "Test Description: Try to scroll element RIGHT moving your outside of the red border";
-}
-
-function updateDescriptionThirdStepTouchActionElement(target, scrollReturnInterval, callback = null) {
-  window.step_timeout(function() {
-    objectScroller(target, 'left', 0);
-    if (callback) {
-      callback();
-    }
-  }, scrollReturnInterval);
-  document.getElementById('desc').innerHTML = "Test Description: Try to scroll element DOWN then RIGHT starting your touch inside of the element. Then tap complete button";
-}
-
-function updateDescriptionFourthStepTouchActionElement(target, scrollReturnInterval) {
-  document.getElementById('desc').innerHTML = "Test Description: Try to scroll element RIGHT starting your touch inside of the element";
-}
-
 function objectScroller(target, direction, value) {
   if (direction == 'up') {
     target.scrollTop = 0;