Merge bitcoin/bitcoin#34260: contrib: Remove unused functions

facaf56214 contrib: Remove unused functions (MarcoFalke)

Pull request description:

  * `remove_files` is unused since 5668c6473a
  * `download_lines_with_urllib` is unused since it was introduced in 37c9fb7a59
  * `determine_wellknown_cmd` is unused since 76c090145e

ACKs for top commit:
  fjahr:
    ACK facaf56214
  bensig:
    ACK facaf56214 straightforward
  l0rinc:
    Reproduced it locally, ACK facaf56214

Tree-SHA512: c7d4880944b57108429e31541f1b97a98101cc06f1be716d6028f4193b6f087d9af06fa87e95ab224e027d574c6bd793cf06e540cdb8997805e1470e0c4e77a2

contrib/devtools/utils.py

@@ -1,21 +0,0 @@
-#!/usr/bin/env python3
-# Copyright (c) 2021-present The Bitcoin Core developers
-# Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
-'''
-Common utility functions
-'''
-import shutil
-import sys
-import os
-
-
-def determine_wellknown_cmd(envvar, progname) -> list[str]:
-    maybe_env = os.getenv(envvar)
-    maybe_which = shutil.which(progname)
-    if maybe_env:
-        return maybe_env.split(' ')  # Well-known vars are often meant to be word-split
-    elif maybe_which:
-        return [ maybe_which ]
-    else:
-        sys.exit(f"{progname} not found")

contrib/verify-binaries/verify.py

@@ -39,8 +39,6 @@ import sys
 import shutil
 import tempfile
 import textwrap
-import urllib.request
-import urllib.error
 import enum
 from hashlib import sha256
 from pathlib import PurePath, Path
@@ -116,18 +114,6 @@ def download_with_wget(remote_file, local_file):
     return result.returncode == 0, result.stdout.decode().rstrip()
 
 
-def download_lines_with_urllib(url) -> tuple[bool, list[str]]:
-    """Get (success, text lines of a file) over HTTP."""
-    try:
-        return (True, [
-            line.strip().decode() for line in urllib.request.urlopen(url).readlines()])
-    except urllib.error.HTTPError as e:
-        log.warning(f"HTTP request to {url} failed (HTTPError): {e}")
-    except Exception as e:
-        log.warning(f"HTTP request to {url} failed ({e})")
-    return (False, [])
-
-
 def verify_with_gpg(
     filename,
     signature_filename,
@@ -148,11 +134,6 @@ def verify_with_gpg(
     return result.returncode, gpg_data
 
 
-def remove_files(filenames):
-    for filename in filenames:
-        os.remove(filename)
-
-
 class SigData:
     """GPG signature data as parsed from GPG stdout."""
     def __init__(self):