[llvm] fix(utils/**.py): fix comparison to None (PR #94022)

[Eisuke Kawashima via llvm-commits]

https://github.com/e-kwsm created https://github.com/llvm/llvm-project/pull/94022

from PEP8 (https://peps.python.org/pep-0008/#programming-recommendations):

> Comparisons to singletons like None should always be done with is or is not, never the equality operators.

>From be2a5af09138a20b810abb5d46229a6416b3a585 Mon Sep 17 00:00:00 2001
From: Eisuke Kawashima <e-kwsm at users.noreply.github.com>
Date: Sat, 11 May 2024 23:57:11 +0900
Subject: [PATCH] fix(utils/**.py): fix comparison to None

from PEP8 (https://peps.python.org/pep-0008/#programming-recommendations):

> Comparisons to singletons like None should always be done with is or
> is not, never the equality operators.
---
 utils/bazel/configure.bzl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/utils/bazel/configure.bzl b/utils/bazel/configure.bzl
index 717b86d7d6e8a..9c3bb321a5afa 100644
--- a/utils/bazel/configure.bzl
+++ b/utils/bazel/configure.bzl
@@ -110,7 +110,7 @@ def _extract_cmake_settings(repository_ctx, llvm_cmake):
         # Skip if `CMAKE_CXX_STANDARD` is set with
         # `LLVM_REQUIRED_CXX_STANDARD`.
         # Then `v` will not be desired form, like "${...} CACHE"
-        if c[k] != None:
+        if c[k] is not None:
             continue
 
         # Pick up 1st word as the value.
@@ -160,7 +160,7 @@ def _llvm_configure_impl(repository_ctx):
         repository_ctx,
         "cmake/Modules/LLVMVersion.cmake",
     )
-    version = {k: v for k, v in version.items() if v != None}
+    version = {k: v for k, v in version.items() if v is not None}
     vars.update(version)
 
     _write_dict_to_file(