Update scripts to specify python2 am: cbd49e760a

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/chromium-trace/+/14186041

Change-Id: I59ad588acb70159b9da0ca57d23b4c49b7c9e079
diff --git a/systrace.py b/systrace.py
index 71da650..7bd4537 100755
--- a/systrace.py
+++ b/systrace.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # Copyright (c) 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
diff --git a/update.py b/update.py
index 2e44e98..d23e2b3 100755
--- a/update.py
+++ b/update.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import optparse
 import os
@@ -13,7 +13,6 @@
     'devil',
     'systrace',
     'third_party/pyserial',
-    'third_party/zipfile',
     'third_party/polymer',
     'tracing/tracing/trace_data',
 ]