is empty.txt in Nimrod/build no longer needed?

[takano32]

Nimrod/build dir contents are now

csources.zip
cycle.h
empty.txt
nimbase.h

there are some files and empty.txt seems no longer needed.

and other projects often use to commit empty dir by addnig `.gitignore'.

thank you. :-)

[Araq]

There are other tools that use the dir structure (for example Windows installer generators) and might depend on 'empty.txt'; Git is not the only tool around. 'cycle.h' and maybe 'nimbase.h' is obsolete, but in general I don't touch these things: I don't like to introduce new bugs in the name of tidiness.