Revert of Make Hands-Off Zero-Touch Enrollment compatibile with tests

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 07536f2b8f03267629b011b567248f304fc39c6b..eccd8b051618ef2dee5c74ec856d47bdede4d19d 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -1914,11 +1914,6 @@
 // and get enrolled into a domain automatically.
 const char kOobeControllerDetected[] = "OobeControllerDetected";
 
-// A 64-bit signed integer pref (encoded as a string) which stores the time
-// of the last OOBE-initiated update check not resulting in an update.
-const char kOobeTimeOfLastUpdateCheckWithoutUpdate[] =
-    "OobeTimeOfLastUpdateCheckWithoutUpdate";
-
 // A boolean pref for whether the Goodies promotion webpage has been displayed,
 // or otherwise disqualified for auto-display, on this device.
 const char kCanShowOobeGoodiesPage[] = "CanShowOobeGoodiesPage";