Remove unused MakeTransactionRef overloads

Author: sipa

src/primitives/transaction.h

@@ -453,8 +453,6 @@ struct CMutableTransaction
 typedef std::shared_ptr<const CTransaction> CTransactionRef;
 static inline CTransactionRef MakeTransactionRef() { return std::make_shared<const CTransaction>(); }
 template <typename Tx> static inline CTransactionRef MakeTransactionRef(Tx&& txIn) { return std::make_shared<const CTransaction>(std::forward<Tx>(txIn)); }
-static inline CTransactionRef MakeTransactionRef(const CTransactionRef& txIn) { return txIn; }
-static inline CTransactionRef MakeTransactionRef(CTransactionRef&& txIn) { return std::move(txIn); }
 
 /** Compute the weight of a transaction, as defined by BIP 141 */
 int64_t GetTransactionWeight(const CTransaction &tx);