autotest[py3] - removing py2 hashbangs

tests don't need them, nor should use them. The tools all have been
migrated so lets just flip the bit.

BUG=b:187788514
TEST=cq,unittests

Change-Id: Ib1326ff3ea19f0b13a4783c85261fc27691df262
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/3367231
Tested-by: Derek Beckett <dbeckett@chromium.org>
Reviewed-by: Jesse McGuire <jessemcguire@google.com>
Commit-Queue: Derek Beckett <dbeckett@chromium.org>
diff --git a/client/site_tests/platform_FileNum/platform_FileNum.py b/client/site_tests/platform_FileNum/platform_FileNum.py
index 86e93bc..0050c37 100755
--- a/client/site_tests/platform_FileNum/platform_FileNum.py
+++ b/client/site_tests/platform_FileNum/platform_FileNum.py
@@ -1,5 +1,3 @@
-#!/usr/bin/python2
-#
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
diff --git a/client/site_tests/platform_FileSize/platform_FileSize.py b/client/site_tests/platform_FileSize/platform_FileSize.py
index 4df39b6..638b6e7 100755
--- a/client/site_tests/platform_FileSize/platform_FileSize.py
+++ b/client/site_tests/platform_FileSize/platform_FileSize.py
@@ -1,5 +1,3 @@
-#!/usr/bin/python2
-#
 # Copyright (c) 2010 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.
diff --git a/client/tools/avgtime b/client/tools/avgtime
index 283567b..ae9e3db 100755
--- a/client/tools/avgtime
+++ b/client/tools/avgtime
@@ -1,4 +1,4 @@
-#!/usr/bin/python2
+#!/usr/bin/python3
 from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function
diff --git a/client/tools/crash_handler.py b/client/tools/crash_handler.py
index 194e605..9507ea1 100755
--- a/client/tools/crash_handler.py
+++ b/client/tools/crash_handler.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python2
+#!/usr/bin/python3
 """
 Simple crash handling application for autotest
 
diff --git a/client/tools/diffprofile b/client/tools/diffprofile
index bc7bdb6..508f528 100755
--- a/client/tools/diffprofile
+++ b/client/tools/diffprofile
@@ -1,4 +1,4 @@
-#!/usr/bin/python2
+#!/usr/bin/python3
 # Copyright Martin J. Bligh (mbligh@google.com)
 # Released under the GPL, v2
 
diff --git a/client/tools/html_report.py b/client/tools/html_report.py
index 783b93e..c389012 100755
--- a/client/tools/html_report.py
+++ b/client/tools/html_report.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python2
+#!/usr/bin/python3
 """
 Module used to parse the autotest job results and generate an HTML report.
 
diff --git a/client/tools/make_clean b/client/tools/make_clean
index 4283977..9cee4f5 100755
--- a/client/tools/make_clean
+++ b/client/tools/make_clean
@@ -1,4 +1,4 @@
-#!/usr/bin/python2
+#!/usr/bin/python3
 from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function
diff --git a/client/tools/oprofile_diff b/client/tools/oprofile_diff
index 2c13124..0e16ff9 100755
--- a/client/tools/oprofile_diff
+++ b/client/tools/oprofile_diff
@@ -1,4 +1,4 @@
-#!/usr/bin/python2
+#!/usr/bin/python3
 from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function