Remove references to the --starlark flag that no longer exists

Change-Id: I6e2b4143d7c6abf785ce7f60cd0036a46a6a6964
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/27161
Reviewed-by: Takuto Ikuta <tikuta@google.com>
Commit-Queue: Matt Stark <msta@google.com>

infra/recipes/gn.py

diff --git a/infra/recipes/gn.py b/infra/recipes/gn.py
index 9e3fe99..914301b 100644
--- a/infra/recipes/gn.py
+++ b/infra/recipes/gn.py
@@ -179,12 +179,12 @@
   configs = [
       {
           'name': 'debug',
-          'args': ['-d', '--use-asan', '--use-ubsan', '--starlark'],
+          'args': ['-d', '--use-asan', '--use-ubsan'],
           'targets': [api.target.host],
       },
       {
           'name': 'release',
-          'args': ['--use-lto', '--use-icf', '--starlark'],
+          'args': ['--use-lto', '--use-icf'],
           'targets': release_targets(),
           # TODO: Enable this for OS X and Windows.
           'use_jemalloc': api.platform.is_linux,