Remove VTS reference to non-shipping OMX/xaac plugin

Bug: 152435602
Test: atest VtsHalMediaOmxV1_0TargetMasterTest
Change-Id: I961993056d545c8a78062abf7ce8d99d9a5bfe43
diff --git a/media/libstagefright/omx/SoftOMXPlugin.cpp b/media/libstagefright/omx/SoftOMXPlugin.cpp
index a720bc9..8c186c9 100644
--- a/media/libstagefright/omx/SoftOMXPlugin.cpp
+++ b/media/libstagefright/omx/SoftOMXPlugin.cpp
@@ -34,12 +34,7 @@
     const char *mRole;
 
 } kComponents[] = {
-    // two choices for aac decoding.
-    // configurable in media/libstagefright/data/media_codecs_google_audio.xml
-    // default implementation
     { "OMX.google.aac.decoder", "aacdec", "audio_decoder.aac" },
-    // alternate implementation
-    { "OMX.google.xaac.decoder", "xaacdec", "audio_decoder.aac" },
     { "OMX.google.aac.encoder", "aacenc", "audio_encoder.aac" },
     { "OMX.google.amrnb.decoder", "amrdec", "audio_decoder.amrnb" },
     { "OMX.google.amrnb.encoder", "amrnbenc", "audio_encoder.amrnb" },