all: remove 2 hidden files, leave just README

These were missed in CL 324270. These files aren't needed
and can be safely removed. This way they won't become out
of date, and they won't invite maintenance.

Change-Id: Id2fb4ed3345836994d0d3b6f9adbcf5f6497ac90
Reviewed-on: https://go-review.googlesource.com/c/blog/+/793340
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Bypass: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>