Disable unused Python 2 variant.

Bug: 245854393
Test: presubmit
Change-Id: Ice4c148a8b3188a290dc891ac4f33270ffbd23b1

Android.bp

diff --git a/Android.bp b/Android.bp
index b20c596..bd78fad 100644
--- a/Android.bp
+++ b/Android.bp
@@ -52,14 +52,6 @@
         "googleapiclient/discovery_cache/*.py",
         "apiclient/*.py",
     ],
-    version: {
-        py2: {
-            enabled: true,
-        },
-        py3: {
-            enabled: true,
-        },
-    },
     libs: [
         "py-httplib2",
         "py-oauth2client",