Remove PYTHONPATH injection for the bundled ml_sdk package.
The legacy ml_sdk dependency is no longer bundled with Google Cloud CLI.
Remove the code that prepends its directory to PYTHONPATH when launching
local prediction subprocesses.
Preserve the existing Python environment and executable discovery logic.
--- ../lib/googlecloudsdk/command_lib/ml_engine/local_utils.py	2026-10-19 14:01:11.947290971 +0300
+++ ../lib/googlecloudsdk/command_lib/ml_engine/local_utils.py	2026-10-19 14:04:39.420649310 +0300
@@ -69,15 +69,6 @@
   # We want to use whatever the user's Python was, before the Cloud SDK started
   # changing the PATH. That's where Tensorflow is installed.
   python_executables = files.SearchForExecutableOnPath('python')
-  # Need to ensure that ml_sdk is in PYTHONPATH for the import in
-  # local_predict to succeed.
-
-  orig_py_path = encoding.GetEncodedValue(env, 'PYTHONPATH') or ''
-  if orig_py_path:
-    orig_py_path = ':' + orig_py_path
-  encoding.SetEncodedValue(
-      env, 'PYTHONPATH',
-      os.path.join(sdk_root, 'lib', 'third_party', 'ml_sdk') + orig_py_path)
   if not python_executables:
     # This doesn't have to be actionable because things are probably beyond help
     # at this point.