Moved email juan to ipfs/contribute

This was part of https://github.com/ipfs/community/issues/63

License: MIT
Signed-off-by: Richard Littauer <richard.littauer@gmail.com>

contribute.md

@@ -15,5 +15,4 @@ Please look and conform to our [Go Contribution Guidelines](https://github.com/i
 - Please make branches and pull-request, even if working on the main repository.
 - Ask questions or talk about things in [Issues](https://github.com/ipfs/go-ipfs/issues) or #ipfs on freenode.
 - Ensure you are able to contribute (no legal issues please-- we'll probably setup a CLA).
-- If you'd like to work on ipfs part-time (20+ hrs/wk) or full-time (40+ hrs/wk), contact [@jbenet](https://github.com/jbenet).
 - Have fun!