Revert "Check in UniquePtr.h locally"

This reverts commit 3d78edca770a570a8c4f7cf2cdc40dadcd5facd0.

Exempt-From-Owner-Approval: Build breakage

Change-Id: Ic4429f454569e95d4cdc5fbd5e38dec16ca6f068
diff --git a/gatekeeper.cpp b/gatekeeper.cpp
index b1e9051..44993cf 100644
--- a/gatekeeper.cpp
+++ b/gatekeeper.cpp
@@ -13,8 +13,8 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+#include <UniquePtr.h>
 #include <gatekeeper/gatekeeper.h>
-#include <gatekeeper/UniquePtr.h>
 
 #include <endian.h>