Cleanup some useless code

[bogdan]

Nested parameters are processed in the same way as not nested parameters - no reason to have custom code for them.

[josevalim]

This patch actually provides a very subtle change in behavior. Before this patch, Active Record guaranteed that the nested hash would be assigned after regular parameters and this patch removes this guarantee. Now if the previous behavior was intentional or not is a question that should be asked.

[bogdan]

Hm, that's interesting. If it is intentional there should be a test for it.

But first of all can you explain how this behavior appeared?

[josevalim]

I don't know how this behaviour appeared as it is impossible to know everything that happens to Rails. :)

I blamed the source code and went through history, this commit seems to have done it: 774ff18

[homakov]

@bogdan Our pull requests are just same.

[bogdan]

@homakov hehe. Closing this one than.