audio: clean up OWNERS

I wrote a script to do this...

Bug: N/A
Test: N/A
Change-Id: I4542f9f5aa38dd94ef1d791719a27a645e7e3180
diff --git a/audio/OWNERS b/audio/OWNERS
index ede448c..3671685 100644
--- a/audio/OWNERS
+++ b/audio/OWNERS
@@ -1 +1,4 @@
-per-file README.md = elaurent@google.com,mnaganov@google.com
+# Bug component: 48436
+
+elaurent@google.com
+mnaganov@google.com