Deprecate the unused AutoCleanupSettigsProto.clean_up_strategy policy.

chrome/browser/chromeos/policy/device_policy_decoder_chromeos.cc

Index: chrome/browser/chromeos/policy/device_policy_decoder_chromeos.cc
diff --git a/chrome/browser/chromeos/policy/device_policy_decoder_chromeos.cc b/chrome/browser/chromeos/policy/device_policy_decoder_chromeos.cc
index 6f9e60657fa733f09786b31a6b5e108d6cfa05d4..15e570f957413f6a23f3607ecd78aa7cf93a1091 100644
--- a/chrome/browser/chromeos/policy/device_policy_decoder_chromeos.cc
+++ b/chrome/browser/chromeos/policy/device_policy_decoder_chromeos.cc
@@ -710,18 +710,6 @@ void DecodeGenericPolicies(const em::ChromeDeviceSettingsProto& policy,
                     NULL);
     }
   }
-  if (policy.has_auto_clean_up_settings()) {
-    const em::AutoCleanupSettigsProto& container(
-        policy.auto_clean_up_settings());
-    if (container.has_clean_up_strategy()) {
-      policies->Set(key::kAutoCleanUpStrategy,
-                    POLICY_LEVEL_MANDATORY,
-                    POLICY_SCOPE_MACHINE,
-                    base::Value::CreateStringValue(
-                        container.clean_up_strategy()),
-                    NULL);
-    }
-  }
 }
 
 }  // namespace