Remove references to different python versions

Python 2 was recently deleted from android's build system, all python binary targets default to py3 now.

Bug: 203436762
Test: Presubmits
Change-Id: If631f2e23855950686ea8eae2504e217630f3824
diff --git a/scripts/Android.bp b/scripts/Android.bp
index e86a9f2..b4d8539 100644
--- a/scripts/Android.bp
+++ b/scripts/Android.bp
@@ -68,12 +68,4 @@
     libs: [
         "update_payload",
     ],
-    version: {
-        py2: {
-            enabled: false,
-        },
-        py3: {
-            enabled: true,
-        },
-    },
 }