Remove force use definition for remote audio submix

Obsolete.

Bug 7318180

Change-Id: I3421ca554a4131d606bdee698aeb7b2091a5d966
diff --git a/include/system/audio_policy.h b/include/system/audio_policy.h
index 6b49a80..a6554de 100644
--- a/include/system/audio_policy.h
+++ b/include/system/audio_policy.h
@@ -43,7 +43,6 @@
     AUDIO_POLICY_FORCE_ANALOG_DOCK,
     AUDIO_POLICY_FORCE_DIGITAL_DOCK,
     AUDIO_POLICY_FORCE_NO_BT_A2DP, /* A2DP sink is not preferred to speaker or wired HS */
-    AUDIO_POLICY_FORCE_REMOTE_SUBMIX,
     AUDIO_POLICY_FORCE_SYSTEM_ENFORCED,
 
     AUDIO_POLICY_FORCE_CFG_CNT,