* lang/cpp/src/assuanresult.cpp: Remove.
* lang/cpp/src/assuanresult.h: Remove.
* lang/cpp/src/Makefile.am: Remove these files.
* lang/cpp/src/context.cpp: Remove header assuanresult.h
(assuanTransact): Change return type to Error.  Use
gpgme_op_assuan_transact_ext.
(startAssuanTransaction): Change return type to Error.
(assuanResult): Remove
* lang/cpp/src/context.h (assuanResult): Adjust for changes.