tests: Reduce compilation time and unneccessary recompiles by removing unused includes in tests

src/test/allocator_tests.cpp

@@ -2,9 +2,9 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
+#include <util/memory.h>
 #include <util/system.h>
 
-#include <support/allocators/secure.h>
 #include <test/setup_common.h>
 
 #include <memory>