Revert "gui: Generate bech32 addresses by default (take 2, fixup)"

This reverts commit fa5a4cd813.

src/interfaces/node.cpp

@@ -201,7 +201,6 @@ public:
         return GuessVerificationProgress(Params().TxData(), tip);
     }
     bool isInitialBlockDownload() override { return ::ChainstateActive().IsInitialBlockDownload(); }
-    bool isAddressTypeSet() override { return !::gArgs.GetArg("-addresstype", "").empty(); }
     bool getReindex() override { return ::fReindex; }
     bool getImporting() override { return ::fImporting; }
     void setNetworkActive(bool active) override