Revert "depot_tools: Run Python scripts using vpython (Part 1)"

This reverts commit d6186f99.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> depot_tools: Run Python scripts using vpython (Part 1)
> 
> Tbr: iannucci@chromium.org
> Bug: 984182
> Change-Id: If36722e190d305f89d63dce91d0a600ddc34ebe3
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1748589
> Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>
> Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>

TBR=iannucci@chromium.org,ehmaldonado@chromium.org

Change-Id: I7686985852608d0703bcbbab137df1ce82b29723
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 984182
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1749853Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>

.gitattributes

@@ -9,10 +9,8 @@
 /*.py  recipes
 /*.sh  recipes
 
-# vpython and vpython specs
-/vpython*
+# vpython specs
 /gsutil.vpython recipes
-/.vpython       recipes
 
 # Extensionless tools we want and support scripts.
 /autoninja*                   recipes

git-runhooks

@@ -15,9 +15,9 @@ gclient_spec="solutions=[{'name':'src','url':None,'deps_file':'.DEPS.git'}]"
 kernel_name=$(uname -s)
 if [ "${kernel_name:0:5}" = "MINGW" ]; then
   dir="${0%\\*}"
-  ${dir}\\vpython "${dir}\\gclient.py" "runhooks" "--spec=$gclient_spec"
+  cmd "/C ${dir}\\python.bat ${dir}\\gclient.py runhooks --spec=$gclient_spec"
 else
   dir="$(dirname $0)"
-  PYTHONDONTWRITEBYTECODE=1 exec $dir/vpython "$dir/gclient.py" runhooks --spec="$gclient_spec"
+  PYTHONDONTWRITEBYTECODE=1 exec python "$dir/gclient.py" runhooks --spec="$gclient_spec"
 fi
 exit $?

git_cache.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_cl.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_drover.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_find_releases.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_footers.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_freezer.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_hyper_blame.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_map.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_map_branches.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_mark_merge_base.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_nav_downstream.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_new_branch.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_number.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_rebase_update.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_rename_branch.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_reparent_branch.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_retry.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_squash_branch.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

git_upstream_diff.py

-#!/usr/bin/env vpython
+#!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

python_runner.sh

@@ -47,9 +47,9 @@ SCRIPT="${SCRIPT-${BASENAME//-/_}.py}"
 if [[ $PYTHON_DIRECT = 1 ]]; then
   python.exe "$DEPOT_TOOLS\\$SCRIPT" "$@"
 else
-  if [ $OSTYPE = msys ]; then
-    PYTHONDONTWRITEBYTECODE=1 $DEPOT_TOOLS\\vpython "$DEPOT_TOOLS\\$SCRIPT" "$@"
+  if [[ -e "$DEPOT_TOOLS/python.bat" && $OSTYPE = msys ]]; then
+    cmd.exe //c "$DEPOT_TOOLS\\python.bat" "$DEPOT_TOOLS\\$SCRIPT" "$@"
   else
-    PYTHONDONTWRITEBYTECODE=1 exec $DEPOT_TOOLS/vpython "$DEPOT_TOOLS/$SCRIPT" "$@"
+    exec "$DEPOT_TOOLS/$SCRIPT" "$@"
   fi
 fi