refactoring: minor cleanup of signing shares

Author: knst

src/llmq/signing_shares.cpp

@@ -15,7 +15,6 @@
 #include <llmq/signing.h>
 #include <msg_result.h>
 #include <netmessagemaker.h>
-#include <spork.h>
 #include <util/irange.h>
 #include <util/thread.h>
 #include <util/time.h>

src/llmq/signing_shares.h

@@ -30,7 +30,6 @@ class CActiveMasternodeManager;
 class ChainstateManager;
 class CNode;
 class CConnman;
-class CDeterministicMN;
 class CSporkManager;
 struct MessageProcessingResult;