Remove support for 32-bit Windows.

Test: ./build.py --host windows64 --toolchain aarch64-linux-android
Bug: None
Exempt-From-Owner-Approval: janitorial
Change-Id: Ifdb9e073d4f86612d32d96c47df566c1b7228501
diff --git a/do_build.py b/do_build.py
index b331437..fac43fe 100755
--- a/do_build.py
+++ b/do_build.py
@@ -25,7 +25,6 @@
 
 # pylint: disable=import-error,wrong-import-position
 import build_support
-from ndk.hosts import Host
 # pylint: enable=import-error,wrong-import-position
 
 
@@ -51,17 +50,19 @@
         sysroot_arg = '--sysroot={}'.format(
             build_support.sysroot_path(toolchain))
         build_cmd = [
-            'bash', 'build-gcc.sh', build_support.toolchain_path(),
-            build_support.ndk_path(), toolchain_name, build_support.jobs_arg(),
+            'bash',
+            'build-gcc.sh',
+            build_support.toolchain_path(),
+            build_support.ndk_path(),
+            toolchain_name,
+            build_support.jobs_arg(),
             sysroot_arg,
+            '--try-64',
         ]
 
         if args.host.is_windows:
             build_cmd.append('--mingw')
 
-        if args.host != Host.Windows:
-            build_cmd.append('--try-64')
-
         build_support.build(build_cmd, args)
 
 if __name__ == '__main__':