Remove TextTrackCue::notifyRegionWhenRemovingDisplayTree

Source/core/html/track/TextTrackCue.cpp

Index: Source/core/html/track/TextTrackCue.cpp
diff --git a/Source/core/html/track/TextTrackCue.cpp b/Source/core/html/track/TextTrackCue.cpp
index f9c02cf544be2aeaae01a92e74db21c06959cca1..500cfa10b19b904f5085943a647178ad6c3d6853 100644
--- a/Source/core/html/track/TextTrackCue.cpp
+++ b/Source/core/html/track/TextTrackCue.cpp
@@ -148,15 +148,6 @@ bool TextTrackCue::isActive()
     return m_isActive && track() && track()->mode() != TextTrack::disabledKeyword();
 }
 
-void TextTrackCue::setIsActive(bool active)
-{
-    m_isActive = active;
-
-    // Remove the display tree as soon as the cue becomes inactive.
-    if (!active)
-        removeDisplayTree();
-}
-
 const AtomicString& TextTrackCue::interfaceName() const
 {
     return EventTargetNames::TextTrackCue;