[cleanup] Remove unused CReserveKey

Author: jnewbery

src/script/script.h

@@ -581,13 +581,4 @@ struct CScriptWitness
     std::string ToString() const;
 };
 
-class CReserveScript
-{
-public:
-    CScript reserveScript;
-    virtual void KeepScript() {}
-    CReserveScript() {}
-    virtual ~CReserveScript() {}
-};
-
 #endif // BITCOIN_SCRIPT_SCRIPT_H

src/validationinterface.h

@@ -18,7 +18,6 @@ class CBlockIndex;
 struct CBlockLocator;
 class CBlockIndex;
 class CConnman;
-class CReserveScript;
 class CValidationInterface;
 class CValidationState;
 class uint256;

src/wallet/wallet.h

@@ -1219,7 +1219,7 @@ class CWallet final : public CCryptoKeyStore, private interfaces::Chain::Notific
 void MaybeResendWalletTxs();
 
 /** A key allocated from the key pool. */
-class CReserveKey final : public CReserveScript
+class CReserveKey
 {
 protected:
     CWallet* pwallet;
@@ -1244,7 +1244,6 @@ class CReserveKey final : public CReserveScript
     void ReturnKey();
     bool GetReservedKey(CPubKey &pubkey, bool internal = false);
     void KeepKey();
-    void KeepScript() override { KeepKey(); }
 };
 
 /** RAII object to check and reserve a wallet rescan */