Revert "Fix memory leak in WebContentAccessibilityImpl"

This reverts commit ee2d144.

Reason for revert: this did not actually fix the issue

Original change's description:
> Fix memory leak in WebContentAccessibilityImpl
>
> Bug: 462184793
> Change-Id: I77b63e2a1506ab58de8469dad632e63bb006ebe2
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7200483
> Auto-Submit: Sam Maier <[email protected]>
> Commit-Queue: Amanda Lin Dietz <[email protected]>
> Reviewed-by: Amanda Lin Dietz <[email protected]>
> Commit-Queue: Sam Maier <[email protected]>
> Cr-Commit-Position: refs/heads/main@{#1549416}

Bug: 462184793
Change-Id: I516c2fb85d15d396b5b6c93e0b2b433c857d0baf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7208681
Bot-Commit: Rubber Stamper <[email protected]>
Reviewed-by: Andrew Grieve <[email protected]>
Auto-Submit: Sam Maier <[email protected]>
Commit-Queue: Sam Maier <[email protected]>
Owners-Override: Sam Maier <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1551243}

Author: Sam Maier

content/public/android/java/src/org/chromium/content/browser/accessibility/WebContentsAccessibilityImpl.java

@@ -54,8 +54,8 @@
 
 import static org.chromium.build.NullUtil.assumeNonNull;
 import static org.chromium.content.browser.accessibility.AccessibilityNodeInfoBuilder.EXTRAS_DATA_REQUEST_IMAGE_DATA_KEY;
-import static org.chromium.content.browser.accessibility.AccessibilityNodeInfoBuilder.EXTRAS_KEY_REQUEST_LAYOUT_BASED_ACTIONS;
 import static org.chromium.content.browser.accessibility.AccessibilityNodeInfoBuilder.EXTRAS_KEY_URL;
+import static org.chromium.content.browser.accessibility.AccessibilityNodeInfoBuilder.EXTRAS_KEY_REQUEST_LAYOUT_BASED_ACTIONS;
 import static org.chromium.content_public.browser.ContentFeatureList.ACCESSIBILITY_MANAGE_BROADCAST_RECEIVER_ON_BACKGROUND;
 
 import android.annotation.SuppressLint;
@@ -828,7 +828,6 @@ public void destroy() {
             WindowEventObserverManager.from(mDelegate.getWebContents()).removeObserver(this);
             mDelegate.getWebContents().removeUserData(WebContentsAccessibilityImpl.class);
         }
-        mBroadcastReceiver = null;
         TraceEvent.end("WebContentsAccessibilityImpl.destroy");
     }