Revert of Move more utility functions to arc_util.

components/arc/arc_util.h

Index: components/arc/arc_util.h
diff --git a/components/arc/arc_util.h b/components/arc/arc_util.h
index 6f7ef0727aa5ebf2df3f564cb6a540243fb2ad97..5ef99d40bd20a0fe2b95d6836793964ead96c3ff 100644
--- a/components/arc/arc_util.h
+++ b/components/arc/arc_util.h
@@ -33,13 +33,6 @@
 // |command_line| must not be nullptr.
 void SetArcAvailableCommandLineForTesting(base::CommandLine* command_line);
 
-// Returns true if ARC should run under Kiosk mode.
-bool IsArcKioskMode();
-
-// Checks if opt-in verification was disabled by switch in command line.
-// In most cases, it is disabled for testing purpose.
-bool IsArcOptInVerificationDisabled();
-
 }  // namespace arc
 
 #endif  // COMPONENTS_ARC_ARC_UTIL_H_