Revert "[inspector] added inspector test runner [part 1]"

This reverts commit dc1c71c0.

Revert "[inspector] added inspector test runner [part 2]"

This reverts commit cceaa122.

Blocks the roll:
https://codereview.chromium.org/2379053003/

In particular android debug:
https://build.chromium.org/p/tryserver.chromium.android/builders/android_clang_dbg_recipe/builds/137605

BUG=chromium:635948
TBR=kozyatinskiy@chromium.org,
NOTRY=true

Review-Url: https://codereview.chromium.org/2387603002
Cr-Commit-Position: refs/heads/master@{#39909}