[clang-tools-extra] [clang-tidy] Remove addition of emacs tag in checks headers (PR #153942)

[Baranov Victor via cfe-commits]

https://github.com/vbvictor created https://github.com/llvm/llvm-project/pull/153942

After https://github.com/llvm/llvm-project/pull/118553, emacs tag is no longer needed in LLVM files: https://llvm.org/docs/CodingStandards.html#file-headers.
This patch removes it from `add_new_check.py` lowering complexity we need to maintain.

>From b95f5bbd45e28e184367b752669d4203dec2b150 Mon Sep 17 00:00:00 2001
From: Victor Baranov <bar.victor.2002 at gmail.com>
Date: Sat, 16 Aug 2025 12:27:07 +0300
Subject: [PATCH] [clang-tidy] Remove addition of emacs tag in checks headers

---
 clang-tools-extra/clang-tidy/add_new_check.py | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/clang-tools-extra/clang-tidy/add_new_check.py b/clang-tools-extra/clang-tidy/add_new_check.py
index e366f10053535..2b51a1dc40ebc 100755
--- a/clang-tools-extra/clang-tidy/add_new_check.py
+++ b/clang-tools-extra/clang-tidy/add_new_check.py
@@ -89,13 +89,9 @@ def write_header(
             + check_name_camel.upper()
             + "_H"
         )
-        f.write("//===--- ")
-        f.write(os.path.basename(filename))
-        f.write(" - clang-tidy ")
-        f.write("-" * max(0, 42 - len(os.path.basename(filename))))
-        f.write("*- C++ -*-===//")
         f.write(
             """
+//===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -145,13 +141,9 @@ def write_implementation(
     filename = os.path.join(module_path, check_name_camel) + ".cpp"
     print("Creating %s..." % filename)
     with io.open(filename, "w", encoding="utf8", newline="\n") as f:
-        f.write("//===--- ")
-        f.write(os.path.basename(filename))
-        f.write(" - clang-tidy ")
-        f.write("-" * max(0, 51 - len(os.path.basename(filename))))
-        f.write("-===//")
         f.write(
             """
+//===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.