I found some people here looking for an easy solution to delete the device logfiles.
Recently I found this:
https://play.google.com/store/apps/details?id=com.KhaldoonZiad.logcatcleaner
Works nicely on JB and KK.
Recently I found this:
https://play.google.com/store/apps/details?id=com.KhaldoonZiad.logcatcleaner
Works nicely on JB and KK.