Removed policy::PolicyNamespaceKey.

components/policy/core/common/cloud/cloud_policy_constants.h

Index: components/policy/core/common/cloud/cloud_policy_constants.h
diff --git a/components/policy/core/common/cloud/cloud_policy_constants.h b/components/policy/core/common/cloud/cloud_policy_constants.h
index b43d6bcf35cf35e3b4d9e227fbc8479aa68cd56d..b9daee29f54da6a83cb661a7f92c52d0f9d33864 100644
--- a/components/policy/core/common/cloud/cloud_policy_constants.h
+++ b/components/policy/core/common/cloud/cloud_policy_constants.h
@@ -6,7 +6,6 @@
 #define COMPONENTS_POLICY_CORE_COMMON_CLOUD_CLOUD_POLICY_CONSTANTS_H_
 
 #include <string>
-#include <utility>
 
 #include "components/policy/policy_export.h"
 
@@ -122,9 +121,6 @@ enum DeviceMode {
                                           // launch a kiosk webapp.
 };
 
-// A pair that combines a policy fetch type and entity ID.
-typedef std::pair<std::string, std::string> PolicyNamespaceKey;
-
 // Returns the Chrome user policy type to use. This allows overridding the
 // default user policy type on Android and iOS for testing purposes.
 // TODO(joaodasilva): remove this once the server is ready.