Make reasoning about dependencies easier by not including unused dependencies

src/core_read.cpp

@@ -2,8 +2,6 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#include <core_io.h>
-
 #include <primitives/block.h>
 #include <primitives/transaction.h>
 #include <script/script.h>
@@ -11,7 +9,6 @@
 #include <serialize.h>
 #include <streams.h>
 #include <univalue.h>
-#include <util/system.h>
 #include <util/strencodings.h>
 #include <version.h>