Remove util/bot/go/env.py

After
https://chromium-review.googlesource.com/c/chromium/tools/build/+/3265540,
it's no longer used anywhere.

Change-Id: I4358a0074c9359cb459df1c20949f12bb3289788
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/70107
Auto-Submit: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>

util/bot/go/env.py

@@ -1,61 +0,0 @@
-#!/usr/bin/env python3
-# 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.
-
-# Modified from go/env.py in Chromium infrastructure's repository to patch out
-# everything but the core toolchain.
-#
-# https://chromium.googlesource.com/infra/infra/
-
-"""Used to wrap a command:
-
-$ ./env.py go version
-"""
-
-assert __name__ == '__main__'
-
-import os
-import subprocess
-import sys
-
-# /path/to/util/bot
-ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
-
-# Platform depended suffix for executable files.
-EXE_SFX = '.exe' if sys.platform == 'win32' else ''
-
-def get_go_environ(goroot):
-  """Returns a copy of os.environ with added GOROOT and PATH variables."""
-  env = os.environ.copy()
-  env['GOROOT'] = goroot
-  gobin = os.path.join(goroot, 'bin')
-  path = env['PATH'].split(os.pathsep)
-  if gobin not in path:
-    env['PATH'] = os.pathsep.join([gobin] + path)
-  return env
-
-def find_executable(name, goroot):
-  """Returns full path to an executable in GOROOT."""
-  basename = name
-  if EXE_SFX and basename.endswith(EXE_SFX):
-    basename = basename[:-len(EXE_SFX)]
-  full_path = os.path.join(goroot, 'bin', basename + EXE_SFX)
-  if os.path.exists(full_path):
-    return full_path
-  return name
-
-# TODO(davidben): Now that we use CIPD to fetch Go, this script does not do
-# much. Switch to setting up GOROOT and PATH in the recipe?
-goroot = os.path.join(ROOT, 'golang')
-new = get_go_environ(goroot)
-
-exe = sys.argv[1]
-if exe == 'python':
-  exe = sys.executable
-else:
-  # Help Windows to find the executable in new PATH, do it only when
-  # executable is referenced by name (and not by path).
-  if os.sep not in exe:
-    exe = find_executable(exe, goroot)
-sys.exit(subprocess.call([exe] + sys.argv[2:], env=new))