Revert of mac: Roll hermetic toolchain to Xcode 8.3.2.

build/mac/should_use_hermetic_xcode.py

Index: build/mac/should_use_hermetic_xcode.py
diff --git a/build/mac/should_use_hermetic_xcode.py b/build/mac/should_use_hermetic_xcode.py
index dc1b930eb0d54751fde2fe305c4686e6aca48370..68e288e32f7c05f670238b0aaec893cb93a996e3 100755
--- a/build/mac/should_use_hermetic_xcode.py
+++ b/build/mac/should_use_hermetic_xcode.py
@@ -3,11 +3,8 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-"""
-Prints "1" if Chrome targets should be built with hermetic Xcode.
-Prints "2" if Chrome targets should be built with hermetic Xcode, but the OS
-version does not meet the minimum requirements of the hermetic version of Xcode.
-Otherwise prints "0".
+"""Prints "1" if Chrome targets should be built with hermetic xcode. Otherwise
+prints "0".
 
 Usage:
   python should_use_hermetic_xcode.py <target_os>
@@ -15,12 +12,6 @@
 
 import os
 import sys
-
-_THIS_DIR_PATH = os.path.abspath(os.path.dirname(os.path.realpath(__file__)))
-_BUILD_PATH = os.path.join(_THIS_DIR_PATH, os.pardir)
-sys.path.insert(0, _BUILD_PATH)
-
-import mac_toolchain
 
 
 def _IsCorpMachine():
@@ -30,8 +21,6 @@
 def main():
   allow_corp = sys.argv[1] == 'mac' and _IsCorpMachine()
   if os.environ.get('FORCE_MAC_TOOLCHAIN') or allow_corp:
-    if not mac_toolchain.PlatformMeetsHermeticXcodeRequirements(sys.argv[1]):
-      return "2"
     return "1"
   else:
     return "0"