Partially revert "atv: Allow setupwraith configs to be set by vendor"

This reverts commit 1f0b09998d3578e2a5c8df4ecb5af340f5937ba6.

Reason: This breaks property namespace isolation rules on 19.0.

Change-Id: I622bc05a397ce5b349fb5d218ebe8fd8a51f7363
diff --git a/atv/vendor/property_contexts b/atv/vendor/property_contexts
deleted file mode 100644
index 9ff3498..0000000
--- a/atv/vendor/property_contexts
+++ /dev/null
@@ -1,2 +0,0 @@
-# Allow vendor to set suw configs
-atv.setup.          u:object_r:exported_default_prop:s0