Remove tools/resources

The script to update the resources before we used the .sha1 files
was moved out in r4277 and later deleted in r5099.
This dir serves no purpose, so let's remove it.

BUG=
R=phoglund@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/17849004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6585 4adac7df-926f-26a2-2b94-8c16560cd09d