Revert "Make buck build with python3"

Summary:
This reverts commit 05216400b6a97570a6c3ee72d951d476c2955555.

On top of: a0ccafb85b40bcab43525a2e5ac6375c7266bc3c

So we can push this if necessary

Reviewed By: philipjameson

shipit-source-id: 80b27f7f1e
diff --git a/.buckconfig b/.buckconfig
index eaa1150..79c9f33 100644
--- a/.buckconfig
+++ b/.buckconfig
@@ -1,7 +1,4 @@
 
-[python]
-    interpreter = python3
-    pex_flags = "--python-shebang=/usr/bin/env python3"
 [repositories]
     buck = .
     bazel_skylib = ./third-party/skylark/bazel-skylib