Revert "Added webrtc audio processing library"

This reverts commit 14052b8db5fbc1da593b0a9b29ebb1a1848232ee
diff --git a/target/product/core.mk b/target/product/core.mk
index a451803..01903c6 100644
--- a/target/product/core.mk
+++ b/target/product/core.mk
@@ -95,8 +95,7 @@
     ip \
     screencap \
     sensorservice \
-    libspeexresampler \
-    libwebrtc_audio_preprocessing
+    libspeexresampler
 
 # host-only dependencies
 ifeq ($(WITH_HOST_DALVIK),true)