bitcoin-wallet: remove duplicate manpage description

The description is now found in the manpage only.

src/bitcoin-wallet.cpp

@@ -68,9 +68,6 @@ static std::optional<int> WalletAppInit(ArgsManager& args, int argc, char* argv[
             strUsage += FormatParagraph(LicenseInfo());
         } else {
             strUsage += "\n"
-                        "bitcoin-wallet is an offline tool for creating and interacting with " PACKAGE_NAME " wallet files.\n"
-                        "By default bitcoin-wallet will act on wallets in the default mainnet wallet directory in the datadir.\n"
-                        "To change the target wallet, use the -datadir, -wallet and -regtest/-signet/-testnet arguments.\n\n"
                         "Usage:\n"
                         "  bitcoin-wallet [options] <command>\n";
             strUsage += "\n" + args.GetHelpMessage();