Fix unused parameter warnings in audio

Change-Id: I665ba3358dd9502f0adec70d486e7bf8a2e1b0fe
diff --git a/services/audioflinger/Effects.cpp b/services/audioflinger/Effects.cpp
index 59b4770..537c076 100644
--- a/services/audioflinger/Effects.cpp
+++ b/services/audioflinger/Effects.cpp
@@ -805,7 +805,7 @@
     return mOffloaded;
 }
 
-void AudioFlinger::EffectModule::dump(int fd, const Vector<String16>& args)
+void AudioFlinger::EffectModule::dump(int fd, const Vector<String16>& args __unused)
 {
     const size_t SIZE = 256;
     char buffer[SIZE];