Remove the JS versions.

Bug: v8:7954
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: I1dc90932e570c4acc7ca32a807b452148a6b2d88
Reviewed-on: https://chromium-review.googlesource.com/1144524
Commit-Queue: Brian Stell <bstell@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54756}