[ci/lint] Add back default arg for pre-commit (#12279)

Signed-off-by: kevin <kevin@anyscale.com>

vllm/platforms/__init__.py

@@ -101,7 +101,7 @@ def cpu_platform_plugin() -> Optional[str]:
     try:
         from importlib.metadata import version
         is_cpu = "cpu" in version("vllm")
-        if is_cpu == False:
+        if not is_cpu:
             import platform
             is_cpu = platform.machine().lower().startswith("arm")