clean-up: Remove no longer used ivars from CInputCoin

src/wallet/coinselection.h

@@ -36,8 +36,6 @@ public:
     COutPoint outpoint;
     CTxOut txout;
     CAmount effective_value;
-    CAmount fee = 0;
-    CAmount long_term_fee = 0;
 
     /** Pre-computed estimated size of this output as a fully-signed input in a transaction. Can be -1 if it could not be calculated */
     int m_input_bytes{-1};