[tools] Clean up Py2 code

Bug: chromium:1292013
Change-Id: I8202fed4d59edcc98fff193f3a4b102a5c79d553
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3525136Reviewed-by: Liviu Rau <liviurau@chromium.org>
Reviewed-by: Tamer Tas <tmrts@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79505}

tools/torque/format-torque.py

-#!/usr/bin/env python
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # Copyright 2014 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
@@ -7,21 +7,16 @@
 """This program either generates the parser files for Torque, generating
 the source and header files directly in V8's src directory."""
 
-# for py2/py3 compatibility
-from __future__ import print_function
-
 import subprocess
 import sys
 import re
 from subprocess import Popen, PIPE
 
-PYTHON3 = sys.version_info >= (3, 0)
-
-def maybe_decode(arg, encoding="utf-8"):
-  return arg.decode(encoding) if PYTHON3 else arg
+def decode(arg, encoding="utf-8"):
+  return arg.decode(encoding)
 
-def maybe_encode(arg, encoding="utf-8"):
-  return arg.encode(encoding) if PYTHON3 else arg
+def encode(arg, encoding="utf-8"):
+  return arg.encode(encoding)
 
 kPercentEscape = r'α';  # Unicode alpha
 kDerefEscape = r'☆'; # Unicode star
@@ -111,8 +106,8 @@ def process(filename, lint, should_format):
     p = Popen(['clang-format', '-assume-filename=.ts'], stdin=PIPE, stdout=PIPE, stderr=PIPE, shell=True)
   else:
     p = Popen(['clang-format', '-assume-filename=.ts'], stdin=PIPE, stdout=PIPE, stderr=PIPE)
-  output, err = p.communicate(maybe_encode(preprocess(content)))
-  output = postprocess(maybe_decode(output))
+  output, err = p.communicate(encode(preprocess(content)))
+  output = postprocess(decode(output))
   rc = p.returncode
   if (rc != 0):
     print("error code " + str(rc) + " running clang-format. Exiting...")
@@ -124,7 +119,7 @@ def process(filename, lint, should_format):
 
     if should_format:
       output_file = open(filename, 'wb')
-      output_file.write(maybe_encode(output))
+      output_file.write(encode(output))
       output_file.close()
 
 def print_usage():