Remove obsolete folder and file

Address comment from aosp/2984492

Test: m
Change-Id: I74ac2871920ff3e258472918c784ebb006ce0afb
diff --git a/packages/Tethering/OWNERS b/packages/Tethering/OWNERS
deleted file mode 100644
index aa87958..0000000
--- a/packages/Tethering/OWNERS
+++ /dev/null
@@ -1 +0,0 @@
-include /services/core/java/com/android/server/net/OWNERS