Remove Skia's forked buildbot code

slave/skia_slave_scripts/check_buildslave_host_disk_usage.py

-#!/usr/bin/env python
-# Copyright (c) 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.
-
-
-"""Verify that the buildslave host machines are under a disk usage threshold."""
-
-
-import re
-import sys
-
-from build_step import BuildStep, BuildStepWarning, BuildStepFailure
-from py.utils import misc
-
-sys.path.append(misc.BUILDBOT_PATH)
-
-from scripts import run_cmd
-
-
-MAX_DISK_USAGE_PERCENT = 90
-
-
-def get_disk_usage_percent(stdout):
-  """Parse the disk_usage.py script output and return the disk usage percent.
-
-  Args:
-      stdout: string; output from the disk_usage script.
-  Returns:
-      float; the percentage of disk space used on the machine.
-  """
-  # The disk_usage.py script's output looks like this:
-  # usage(total=382117335040, used=178414583808, free=184575676416)
-  total = float(re.findall('total=(\d+)', stdout)[0])
-  used = float(re.findall('used=(\d+)', stdout)[0])
-  return used / total * 100.0
-
-
-class CheckSlaveHostsDiskUsage(BuildStep):
-  def _Run(self):
-    disk_usage_script = run_cmd.ResolvablePath('third_party', 'disk_usage',
-                                               'disk_usage.py')
-    results = run_cmd.run_on_all_slave_hosts(['python', disk_usage_script])
-    failed = []
-    over_threshold = False
-    print 'Maximum allowed disk usage percent: %d\n' % MAX_DISK_USAGE_PERCENT
-    for host in results.iterkeys():
-      print host,
-      got_result = True
-      if results[host].returncode != 0:
-        got_result = False
-      else:
-        try:
-          percent_used = get_disk_usage_percent(results[host].stdout)
-          print ': %d%%' % percent_used,
-          if percent_used > MAX_DISK_USAGE_PERCENT:
-            print ' (over threshold)'
-            over_threshold = True
-          else:
-            print
-        except (IndexError, ZeroDivisionError):
-          got_result = False
-      if not got_result:
-        failed.append(host)
-        print ': failed: ', results[host].stderr
-
-    if failed:
-      print
-      print 'Failed to get disk usage for the following hosts:'
-      for failed_host in failed:
-        print ' ', failed_host
-
-    if over_threshold:
-      raise BuildStepFailure('Some hosts are over threshold.')
-
-    if failed:
-      # TODO(borenet): Make sure that we can log in to all hosts, then make this
-      # an error.
-      raise BuildStepWarning('Could not log in to some hosts.')
-
-
-if '__main__' == __name__:
-  sys.exit(BuildStep.RunBuildStep(CheckSlaveHostsDiskUsage))