Remove BaseClass type since there's only one type of class: RClass.
Remove BaseClass type since there's only one type of class: RClass.

hachi8833/goby,Maxwell-Alexius/goby,Maxwell-Alexius/goby,goby-lang/goby,Maxwell-Alexius/goby,hachi8833/goby,goby-lang/goby,st0012/Rooby,st0012/Rooby,goby-lang/goby,hachi8833/goby