Revert "Add keychain user"

This reverts commit 6541ef1562ccf93e498d653598330a7fc80ad2b2.

Bug:4970237
Change-Id: I23a90eb89c1d19893d2ba7065fc624c0521cb06e
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 26c3acb..a1f5581 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -150,7 +150,7 @@
     mkdir /data/misc/bluetoothd 0770 bluetooth bluetooth
     mkdir /data/misc/bluetooth 0770 system system
     mkdir /data/misc/keystore 0700 keystore keystore
-    mkdir /data/misc/keychain 0771 keychain keychain
+    mkdir /data/misc/keychain 0771 system system
     mkdir /data/misc/vpn 0770 system system
     mkdir /data/misc/systemkeys 0700 system system
     mkdir /data/misc/vpn/profiles 0770 system system