rpc: Allow gettxoutsetinfo and getblockstats for stale blocks

Author: fjahr

src/rpc/blockchain.cpp

@@ -162,9 +162,7 @@ CBlockIndex* ParseHashOrHeight(const UniValue& param, ChainstateManager& chainma
         if (!pindex) {
             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");
         }
-        if (!active_chain.Contains(pindex)) {
-            throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Block is not in chain %s", Params().NetworkIDString()));
-        }
+
         return pindex;
     }
 }