update comments

Author: rickeylev

MODULE.bazel

@@ -37,9 +37,6 @@ use_repo(
 # We need to do another use_extension call to expose the "pythons_hub"
 # repo.
 python = use_extension("//python/extensions:python.bzl", "python")
-python.defaults(
-    python_version = "3.11",
-)
 
 # The default toolchain to use if nobody configures a toolchain.
 # NOTE: This is not a stable version. It is provided for convenience, but will