scripted-diff: remove MakeUnique<T>()

-BEGIN VERIFY SCRIPT-
git rm src/util/memory.h
sed -i -e 's/MakeUnique/std::make_unique/g' $(git grep -l MakeUnique src)
sed -i -e '/#include <util\/memory.h>/d' $(git grep -l '#include <util/memory.h>' src)
sed -i -e '/util\/memory.h \\/d' src/Makefile.am
-END VERIFY SCRIPT-

src/httprpc.cpp

@@ -301,7 +301,7 @@ bool StartHTTPRPC(const util::Ref& context)
     }
     struct event_base* eventBase = EventBase();
     assert(eventBase);
-    httpRPCTimerInterface = MakeUnique<HTTPRPCTimerInterface>(eventBase);
+    httpRPCTimerInterface = std::make_unique<HTTPRPCTimerInterface>(eventBase);
     RPCSetTimerInterface(httpRPCTimerInterface.get());
     return true;
 }