Sapling and Overwinter network upgrades are always active

These NU's are always active for Hush Arrakis Chains so this code only serves
to slow down all operations by constantly being checked. So we disable them
which will speed up syncing, mining and creating transactions.

src/wallet/asyncrpcoperation_sendmany.cpp

@@ -309,8 +309,9 @@ bool AsyncRPCOperation_sendmany::main_impl() {
         t_inputs_      = selectedTInputs;
         t_inputs_total = selectedUTXOAmount;
 
+        /*
         // Check mempooltxinputlimit to avoid creating a transaction which the local mempool rejects
-        size_t limit = (size_t)GetArg("-mempooltxinputlimit", 0);
+        const size_t limit = (size_t)GetArg("-mempooltxinputlimit", 0);
         {
             LOCK(cs_main);
             if (NetworkUpgradeActive(chainActive.Height() + 1, Params().GetConsensus(), Consensus::UPGRADE_OVERWINTER)) {
@@ -323,6 +324,7 @@ bool AsyncRPCOperation_sendmany::main_impl() {
                 throw JSONRPCError(RPC_WALLET_ERROR, strprintf("Too many transparent inputs %zu > limit %zu", n, limit));
             }
         }
+        */
 
         // update the transaction with these inputs
         if (isUsingBuilder_) {