Don't force Python 2 when building the desugared library maven artifact

The BUILD file was updated to Python 3 in
https://github.com/google/desugar_jdk_libs/commit/c3f88ccba469a041961dbb3fbbf5bf04962cecbd

Change-Id: Ia61b892bd1d413ffbc301ac148afae7f31d8d79a
diff --git a/tools/archive_desugar_jdk_libs.py b/tools/archive_desugar_jdk_libs.py
index 7714362..343a7f2 100755
--- a/tools/archive_desugar_jdk_libs.py
+++ b/tools/archive_desugar_jdk_libs.py
@@ -115,7 +115,7 @@
             'Target archive directory %s already exists' % destination)
 
       bazel = os.path.join(utils.BAZEL_TOOL, 'lib', 'bazel', 'bin', 'bazel')
-      cmd = [bazel, 'build', '--host_force_python=PY2', 'maven_release']
+      cmd = [bazel, 'build', 'maven_release']
       utils.PrintCmd(cmd)
       subprocess.check_call(cmd)
       cmd = [bazel, 'shutdown']