ansible - 11:16 pm on Jul 8, 2006 (gmt 0)

You can use robots.txt to disallow all of something, like logs (in your case). It would just look like this:

Disallow: /*.log

OR

You can just disallow that file:

Disallow: /WS_FTP.log

Once you do this, with some time, it should remove your log file from search engine indexes.