Revert of Temporarily upload minidump to private cloud storage on windows....

Revert of Temporarily upload minidump to private cloud storage on windows. (patchset #1 id:1 of https://codereview.chromium.org/899293003/)

Reason for revert:
Got a minidump, reverting.

Original issue's description:
> Temporarily upload minidump to private cloud storage on windows.
>
> Should be reverted once we have one from crashing startup.warm.blank_page perf test.
>
> BUG=433966
>
> Committed: https://crrev.com/82a66024f96d8643f42e9ad21fcf3e79e78c8804
> Cr-Commit-Position: refs/heads/master@{#314902}

TBR=sullivan@chromium.org,skyostil@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=433966

Review URL: https://codereview.chromium.org/896303003

Cr-Commit-Position: refs/heads/master@{#315033}

tools/telemetry/telemetry/core/backends/chrome/desktop_browser_backend.py

@@ -2,7 +2,6 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import datetime
 import glob
 import heapq
 import logging
@@ -18,7 +17,6 @@ from telemetry.core import exceptions
 from telemetry.core import util
 from telemetry.core.backends import browser_backend
 from telemetry.core.backends.chrome import chrome_browser_backend
-from telemetry.util import cloud_storage
 from telemetry.util import path
 from telemetry.util import support_binaries
 
@@ -328,19 +326,6 @@ class DesktopBrowserBackend(chrome_browser_backend.ChromeBrowserBackend):
     return subprocess.check_output([stackwalk, minidump, symbols_path],
                                    stderr=open(os.devnull, 'w'))
 
-  def _UploadMinidumpToCloudStorage(self, minidump_path):
-    os_name = self.browser.platform.GetOSName()
-    if os_name == 'win':
-      try:
-        remote_path = ('minidump-%s.dmp' % (
-            datetime.datetime.now().strftime('%Y-%m-%d_%H-%M-%S')))
-        cloud_url = cloud_storage.Insert(
-            cloud_storage.INTERNAL_BUCKET, remote_path, minidump_path)
-        print 'View minidump online at %s\n' % cloud_url
-      except cloud_storage.PermissionError as e:
-        logging.error('Cannot upload minidump to cloud storage due to'
-                      ' permission error: %s' % e.message)
-
   def GetStackTrace(self):
     most_recent_dump = self._GetMostRecentMinidump()
     if not most_recent_dump:
@@ -348,9 +333,6 @@ class DesktopBrowserBackend(chrome_browser_backend.ChromeBrowserBackend):
           self.GetStandardOutput())
 
     logging.info('minidump found: %s' % most_recent_dump)
-
-    self._UploadMinidumpToCloudStorage(most_recent_dump)
-
     stack = self._GetStackFromMinidump(most_recent_dump)
     if not stack:
       return 'Failed to symbolize minidump. Returning browser stdout:\n' + (