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/test/fuzz/process_messages.cpp

@@ -14,7 +14,6 @@
 #include <test/util/setup_common.h>
 #include <test/util/validation.h>
 #include <txorphanage.h>
-#include <util/memory.h>
 #include <validation.h>
 #include <validationinterface.h>