remove temporary doge fee hackfix

Closes #763.

Author: sneurlax

lib/electrumx_rpc/electrumx_client.dart

@@ -1020,18 +1020,6 @@ class ElectrumXClient {
         ],
       );
       try {
-        // If the response is -1 or null, return a temporary hardcoded value for
-        // Dogecoin.  This is a temporary fix until the fee estimation is fixed.
-        if (coin == Coin.dogecoin &&
-            (response == null ||
-                response == -1 ||
-                Decimal.parse(response.toString()) == Decimal.parse("-1"))) {
-          // Return 0.05 for slow, 0.2 for average, and 1 for fast txs.
-          // These numbers produce tx fees in line with txs in the wild on
-          // https://dogechain.info/
-          return Decimal.parse((1 / blocks).toString());
-          // TODO [prio=med]: Fix fee estimation.
-        }
         return Decimal.parse(response.toString());
       } catch (e, s) {
         final String msg = "Error parsing fee rate.  Response: $response"