refactor: post Optional<> removal cleanups

src/wallet/coinselection.cpp

@@ -4,11 +4,12 @@
 
 #include <wallet/coinselection.h>
 
-#include <optional>
 #include <policy/feerate.h>
 #include <util/system.h>
 #include <util/moneystr.h>
 
+#include <optional>
+
 // Descending order comparator
 struct {
     bool operator()(const OutputGroup& a, const OutputGroup& b) const