Revert^2 "add sepolicy type for widevine/drm hal in system"

This reverts commit a0e696357c7f3da72ebdb6237b2343e6b8a7afac.

Reason for revert: https://googleplex-android-review.git.corp.google.com/q/hashtag:%22b/398929391%22+(status:open%20OR%20status:merged)

Change-Id: I379734cc1adb33b874ba35daa9ace7485c79baa8
diff --git a/private/file_contexts b/private/file_contexts
index 0b3e7f4..23a895e 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -555,6 +555,7 @@
 
 /(system_ext|system/system_ext)/etc/aconfig(/.*)?                u:object_r:system_aconfig_storage_file:s0
 /(system_ext|system/system_ext)/etc/selinux/system_ext_tee_service_contexts  u:object_r:tee_service_contexts_file:s0
+/(system_ext|system/system_ext)/bin/hw/android\.hardware\.drm-service\.widevine\.system   u:object_r:hal_widevine_system_exec:s0
 
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