Remove unused variable in VolumeControlAction

Test: atest com.android.server.hdmi
Change-Id: Ibe8a2be47902d32d2016ef66a714b90040e6005a
diff --git a/services/core/java/com/android/server/hdmi/VolumeControlAction.java b/services/core/java/com/android/server/hdmi/VolumeControlAction.java
index 0011387..d5761e170 100644
--- a/services/core/java/com/android/server/hdmi/VolumeControlAction.java
+++ b/services/core/java/com/android/server/hdmi/VolumeControlAction.java
@@ -138,7 +138,6 @@
     }
 
     private boolean handleReportAudioStatus(HdmiCecMessage cmd) {
-        byte params[] = cmd.getParams();
         boolean mute = HdmiUtils.isAudioStatusMute(cmd);
         int volume = HdmiUtils.getAudioStatusVolume(cmd);
         mLastAvrVolume = volume;