enter_chroot: delete old subversion logic

We deleted all svn tools from the tree already.

BUG=chromium:879376
TEST=CQ passes

Change-Id: If9e66747c63bb445a8d0d4463a2d964166fcbe06
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/2276815
Reviewed-by: Alex Klein <saklein@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
1 file changed