build: Delete files from the previous build system.

There are other files in sub-repos that I'll delete
in separate changelists.

BUG=none
TEST=built an image using portage

Review URL: http://codereview.chromium.org/1521015
6 files changed
tree: 88db02b086b977da390968184433b1af65fef4fe
  1. main.cc
  2. microbenchmark.cc
  3. microbenchmark.h
  4. SConstruct