Remove unused code behind USE(PLATFORM_TEXT_TRACK_MENU)

Source/core/html/track/TextTrack.cpp

Index: Source/core/html/track/TextTrack.cpp
diff --git a/Source/core/html/track/TextTrack.cpp b/Source/core/html/track/TextTrack.cpp
index 0e86b91e8cff04e13ae50553cc3f527d3af61fe2..7ff21eefeca901b403e357eb40e873cffa455d53 100644
--- a/Source/core/html/track/TextTrack.cpp
+++ b/Source/core/html/track/TextTrack.cpp
@@ -482,38 +482,6 @@ bool TextTrack::hasCue(TextTrackCue* cue)
     return false;
 }
 
-#if USE(PLATFORM_TEXT_TRACK_MENU)
-PassRefPtr<PlatformTextTrack> TextTrack::platformTextTrack()
-{
-    if (m_platformTextTrack)
-        return m_platformTextTrack;
-
-    PlatformTextTrack::TrackKind kind = PlatformTextTrack::Caption;
-    if (m_kind == subtitlesKeyword())
-        kind = PlatformTextTrack::Subtitle;
-    else if (m_kind == captionsKeyword())
-        kind = PlatformTextTrack::Caption;
-    else if (m_kind == descriptionsKeyword())
-        kind = PlatformTextTrack::Description;
-    else if (m_kind == chaptersKeyword())
-        kind = PlatformTextTrack::Chapter;
-    else if (m_kind == metadataKeyword())
-        kind = PlatformTextTrack::MetaData;
-
-    PlatformTextTrack::TrackType type = PlatformTextTrack::OutOfBand;
-    if (m_trackType == TrackElement)
-        type = PlatformTextTrack::OutOfBand;
-    else if (m_trackType == AddTrack)
-        type = PlatformTextTrack::Script;
-    else if (m_trackType == InBand)
-        type = PlatformTextTrack::InBand;
-
-    m_platformTextTrack = PlatformTextTrack::create(this, m_label, m_language, kind, type);
-
-    return m_platformTextTrack;
-}
-#endif
-
 bool TextTrack::isMainProgramContent() const
 {
     // "Main program" content is intrinsic to the presentation of the media file, regardless of locale. Content such as