refactor: Cleanup headers from walletmodel.h

src/qt/walletcontroller.h

@@ -6,7 +6,6 @@
 #define BITCOIN_QT_WALLETCONTROLLER_H
 
 #include <qt/sendcoinsrecipient.h>
-#include <qt/walletmodel.h>
 #include <support/allocators/secure.h>
 #include <sync.h>
 
@@ -24,10 +23,12 @@
 
 class OptionsModel;
 class PlatformStyle;
+class WalletModel;
 
 namespace interfaces {
 class Handler;
 class Node;
+class Wallet;
 } // namespace interfaces
 
 class AskPassphraseDialog;