audio policy: deprecate ro.camera.sound.forced

The volume and routing policy of AUDIO_STREAM_ENFORCED_AUDIBLE is
now controlled by AudioService.

Do not read ro.camera.sound.forced is not needed anymore.

Bug 7032634.

Change-Id: Ic0a6396fc4b6efb91cdb4dffe0c8eb035d0440bd
diff --git a/services/audioflinger/AudioPolicyService.cpp b/services/audioflinger/AudioPolicyService.cpp
index 3a2dbe2..155a0b8 100644
--- a/services/audioflinger/AudioPolicyService.cpp
+++ b/services/audioflinger/AudioPolicyService.cpp
@@ -91,10 +91,6 @@
     if (rc)
         return;
 
-    property_get("ro.camera.sound.forced", value, "0");
-    forced_val = strtol(value, NULL, 0);
-    mpAudioPolicy->set_can_mute_enforced_audible(mpAudioPolicy, !forced_val);
-
     ALOGI("Loaded audio policy from %s (%s)", module->name, module->id);
 
     // load audio pre processing modules