Make reasoning about dependencies easier by not including unused dependencies

src/policy/fees.cpp

@@ -4,7 +4,6 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <policy/fees.h>
-#include <policy/policy.h>
 
 #include <clientversion.h>
 #include <primitives/transaction.h>

src/policy/policy.cpp

@@ -9,10 +9,6 @@
 
 #include <consensus/validation.h>
 #include <coins.h>
-#include <policy/settings.h>
-#include <tinyformat.h>
-#include <util/system.h>
-#include <util/strencodings.h>
 
 
 CAmount GetDustThreshold(const CTxOut& txout, const CFeeRate& dustRelayFeeIn)