Remove left over dead code.
Remove left over dead code.

This code became dead with f1cd927d9a062c126df6b9c9ee68750432019214,
when more RPCHelpMan features were used replacing the need for manually
constructing the JSON delimiter.

domob1812/namecore,pataquets/namecoin-core,domob1812/namecore,namecoin/namecore,namecoin/namecore,domob1812/namecore,namecoin/namecoin-core,namecoin/namecore,pataquets/namecoin-core,namecoin/namecore,namecoin/namecore,namecoin/namecoin-core,pataquets/namecoin-core,domob1812/namecore,pataquets/namecoin-core,pataquets/namecoin-core,namecoin/namecoin-core,domob1812/namecore,namecoin/namecoin-core,domob1812/namecore,pataquets/namecoin-core,namecoin/namecore,namecoin/namecoin-core,namecoin/namecoin-core