avoid duplicate of mediaswcodec seccomp policy files

Remove superfluous Android.bp clauses

Bug: 160125811
Test: check generated files, boot to verify use of proper files
Change-Id: I7f4e88553ae3b014a00adbfd796e72b43d31ee61
diff --git a/services/mediacodec/Android.bp b/services/mediacodec/Android.bp
index 775582a..05bbbc7 100644
--- a/services/mediacodec/Android.bp
+++ b/services/mediacodec/Android.bp
@@ -21,8 +21,6 @@
 
     init_rc: ["mediaswcodec.rc"],
 
-    required: ["mediaswcodec.policy"],
-
     cflags: [
         "-Werror",
         "-Wall",