Revert of Make landmines work on local builds too (patchset #3 of https://codereview.chromium.org/457003004/)

Reason for revert:
Apparently this requires win_toolchain.json to exist, but I'm not sure how it's supposed to get there (as seen on a clobber build):


Traceback (most recent call last):
  File "src/build/landmines.py", line 132, in <module>
    sys.exit(main())
  File "src/build/landmines.py", line 119, in main
    gyp_environment.SetEnvironment()
  File "C:\b\build\slave\win_trunk\build\src\build\gyp_environment.py", line 33, in SetEnvironment
    vs_toolchain.SetEnvironmentAndGetRuntimeDllDirs()
  File "C:\b\build\slave\win_trunk\build\src\build\vs_toolchain.py", line 33, in SetEnvironmentAndGetRuntimeDllDirs
    with open(json_data_file, 'r') as tempf:
IOError: [Errno 2] No such file or directory: 'C:\\b\\build\\slave\\win_trunk\\build\\src\\build\\win_toolchain.json'

Original issue's description:
> Make landmines work on local builds too
> 
> Moves (some of) gyp environment setup out of gyp_chromium into separate
> module, and shares that between gyp_chromium and landmines.py.
> 
> landmines.py is added as the first entry in DEPS hooks so that it can
> clobber the entire build directory before running other hooks that
> extract/generate into the build dir.
> 
> R=iannucci@chromium.org
> BUG=400011
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=289099

TBR=scottmg@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=400011

Review URL: https://codereview.chromium.org/469623002

Cr-Commit-Position: refs/heads/master@{#289158}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289158 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 0 insertions, 33 deletions

diff --git a/build/gyp_environment.py b/build/gyp_environment.py
deleted file mode 100644
index fb50645..0000000
--- a/build/gyp_environment.py
+++ /dev/null
@@ -1,33 +0,0 @@
-# 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.
-
-"""
-Sets up various automatic gyp environment variables. These are used by
-gyp_chromium and landmines.py which run at different stages of runhooks. To
-make sure settings are consistent between them, all setup should happen here.
-"""
-
-import gyp_helper
-import os
-import sys
-import vs_toolchain
-
-def SetEnvironment():
-  """Sets defaults for GYP_* variables."""
-  gyp_helper.apply_chromium_gyp_env()
-
-  # Default to ninja on linux and windows, but only if no generator has
-  # explicitly been set.
-  # Also default to ninja on mac, but only when not building chrome/ios.
-  # . -f / --format has precedence over the env var, no need to check for it
-  # . set the env var only if it hasn't been set yet
-  # . chromium.gyp_env has been applied to os.environ at this point already
-  if sys.platform.startswith(('linux', 'win', 'freebsd')) and \
-      not os.environ.get('GYP_GENERATORS'):
-    os.environ['GYP_GENERATORS'] = 'ninja'
-  elif sys.platform == 'darwin' and not os.environ.get('GYP_GENERATORS') and \
-      not 'OS=ios' in os.environ.get('GYP_DEFINES', []):
-    os.environ['GYP_GENERATORS'] = 'ninja'
-
-  vs_toolchain.SetEnvironmentAndGetRuntimeDllDirs()