Remove METADATA file

This directory doesn't contain third-party code and it doesn't need a METADATA file.

Bug: 380376695
Change-Id: I6d56b8ecfc35ba076a90dc208956b195cd562e35
diff --git a/METADATA b/METADATA
deleted file mode 100644
index d97975c..0000000
--- a/METADATA
+++ /dev/null
@@ -1,3 +0,0 @@
-third_party {
-  license_type: NOTICE
-}