Remove libopus from apex_available whitelist

libopus sets its own apex_available property.

Bug: 150999716
Test: m
Change-Id: I4cff3ebb7e017a1fb629b18b72238acf3df0d26e
diff --git a/apex/apex.go b/apex/apex.go
index 8463ac1..1a72769 100644
--- a/apex/apex.go
+++ b/apex/apex.go
@@ -562,7 +562,6 @@
 		"libnativebridge_lazy",
 		"libnativeloader_lazy",
 		"libnativewindow_headers",
-		"libopus",
 		"libpdx_headers",
 		"libprocessgroup",
 		"libprocessgroup_headers",