Remove duplicate function declaration in Row.h

[AryanGitHub]

just removed the line 125th line.

void Row_display(const Object* cast, RichString* out);
Fixes #1553

Thanks.

[BenBE]

Thank you for your PR.

The duplicate declaration of a function in C isn't usually a bug, as you can have as many of them as you like as long as they all agree with each other.

In the context of Row.h there is a small difference between functions called Row_display (present current state) and Row_print… (prepare this visual state). Thus keeping the first one in favour of the second one below makes semantically a bit more sense, as it keeps the actions an user want's to perform with the row (create, free, display its contents) together, while having the operations needed for maintenance (filling its presentation with data to display) in a group below.