parser: Disable user-declared functions for now. Fixes #62.
parser: Disable user-declared functions for now. Fixes #62.

They can't do anything except for alias the builtins, so just don't let them
be declared at all. This also fixes a bug where functions were being declared
via parse_decl, which wasn't including the proper type info (and would cause
a crash).

boardwalk/lily,crasm/lily,boardwalk/lily,crasm/lily,crasm/lily