audioflinger: Remove "exiting=1" parameter

This was used by the remote submix module to unstuck when
input is not consumed. The remote submix module was updated
to not require it.

Bug: 73175392
Test: make
Change-Id: Ic7f6ecbe83251e39052be0693b89db52ab18947c
diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 3134323..1301998 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -1837,10 +1837,6 @@
 void AudioFlinger::PlaybackThread::preExit()
 {
     ALOGV("  preExit()");
-    // FIXME this is using hard-coded strings but in the future, this functionality will be
-    //       converted to use audio HAL extensions required to support tunneling
-    status_t result = mOutput->stream->setParameters(String8("exiting=1"));
-    ALOGE_IF(result != OK, "Error when setting parameters on exit: %d", result);
 }
 
 // PlaybackThread::createTrack_l() must be called with AudioFlinger::mLock held