Remove obsolete error on wifi_ext

Bug: 170190081
Test: boot with no wifi_ext denial found
Change-Id: Ie80b0d5195d21f71211489691c8a824edd7b2a75
diff --git a/tracking_denials/hal_wifi_ext.te b/tracking_denials/hal_wifi_ext.te
deleted file mode 100644
index 9d4e627..0000000
--- a/tracking_denials/hal_wifi_ext.te
+++ /dev/null
@@ -1,2 +0,0 @@
-# b/170190081
-dontaudit hal_wifi_ext debugfs_wlan:dir search ;