Revert "[tools] Add vpython config for run-tests.py"

This reverts commit 0b971dc2.

Reason for revert: not needed anymore

Original change's description:
> [tools] Add vpython config for run-tests.py
> 
> R=​machenbach@chromium.org
> 
> Bug: v8:7187
> Change-Id: I9c64d637501f074464b1fe3637df50be447603ab
> Reviewed-on: https://chromium-review.googlesource.com/1098934
> Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#53875}

TBR=machenbach@chromium.org,sergiyb@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: v8:7187
Change-Id: I55d34e65c32e4ae8864ff883870d82803aa11355
Reviewed-on: https://chromium-review.googlesource.com/c/1377049Reviewed-by: Sergiy Belozorov <sergiyb@chromium.org>
Commit-Queue: Sergiy Belozorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58231}

tools/run-tests.py.vpython

-# This is a vpython "spec" file.
-#
-# It describes patterns for python wheel dependencies of the python scripts in
-# the chromium repo, particularly for dependencies that have compiled components
-# (since pure-python dependencies can be easily vendored into third_party).
-#
-# When vpython is invoked, it finds this file and builds a python VirtualEnv,
-# containing all of the dependencies described in this file, fetching them from
-# CIPD (the "Chrome Infrastructure Package Deployer" service). Unlike `pip`,
-# this never requires the end-user machine to have a working python extension
-# compilation environment. All of these packages are built using:
-#   https://chromium.googlesource.com/infra/infra/+/master/infra/tools/dockerbuild/
-#
-# All python scripts in the repo share this same spec, to avoid dependency
-# fragmentation.
-#
-# If you have depot_tools installed in your $PATH, you can invoke python scripts
-# in this repo by running them as you normally would run them, except
-# substituting `vpython` instead of `python` on the command line, e.g.:
-#   vpython path/to/script.py some --arguments
-#
-# Read more about `vpython` and how to modify this file here:
-#   https://chromium.googlesource.com/infra/infra/+/master/doc/users/vpython.md
-
-python_version: "2.7"
-
-# Used by:
-#   test/test262
-wheel: <
-  name: "infra/python/wheels/pyyaml/${vpython_platform}"
-  version: "version:3.12"
->