pbtk: rm ignore_root_user_error = True since this is now the default

#test-continuous

At least as of 1.4.1 - https://rules-python.readthedocs.io/en/1.4.1/api/rules_python/python/extensions/python.html#python.toolchain

PiperOrigin-RevId: 781214153
diff --git a/MODULE.bazel b/MODULE.bazel
index 744ad1f..d4f8921 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -130,9 +130,6 @@
 
 [
     python.toolchain(
-        # Disable root warning for .pyc cache misses since CI runs as root.
-        # See https://github.com/bazelbuild/rules_python/pull/713
-        ignore_root_user_error = True,
         is_default = python_version == SUPPORTED_PYTHON_VERSIONS[-1],
         python_version = python_version,
     )