logs.txt: remove accidentally added file

This file was checked in CL 103535.

Change-Id: I03e36ba36e30444c4f8e394caef9224ecd6dd728
GitHub-Last-Rev: 6b7fb62f824c5c68be800aa98cf10241b48b1cc4
GitHub-Pull-Request: golang/go#25559
Reviewed-on: https://go-review.googlesource.com/114521Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>