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/qt/sendcoinsdialog.cpp

@@ -266,7 +266,7 @@ bool SendCoinsDialog::PrepareSendText(QString& question_string, QString& informa
     }
 
     // prepare transaction for getting txFee earlier
-    m_current_transaction = MakeUnique<WalletModelTransaction>(recipients);
+    m_current_transaction = std::make_unique<WalletModelTransaction>(recipients);
     WalletModel::SendCoinsReturn prepareStatus;
 
     updateCoinControlState(*m_coin_control);