Revert " audio: Avoid mic mute on proxy during call"

This reverts commit c0ca209d9ff7167ec6cb361b60f77e9488711272

Change-Id: I8e05f5ca9ecc7df3df064f39ad691e10462d57d8
diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index e2b55de..575f2bf 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -2798,8 +2798,7 @@
 
     pthread_mutex_lock(&adev->lock);
     ALOGD("%s state %d\n", __func__, state);
-    if(!adev->voice_tx_output)
-       ret = voice_set_mic_mute((struct audio_device *)dev, state);
+    ret = voice_set_mic_mute((struct audio_device *)dev, state);
     pthread_mutex_unlock(&adev->lock);
 
     return ret;