Remove requests_toolbelt

setup.py

@@ -16,9 +16,6 @@ requirements = [
     "click>=5.0,<9.0",
     "click-log>=0.3.0, <0.5.0",
     "requests >=2.20.0",
-    # https://github.com/sigmavirus24/requests-toolbelt/pull/28
-    # And https://github.com/sigmavirus24/requests-toolbelt/issues/54
-    "requests_toolbelt >=0.4.0",
     # https://github.com/untitaker/python-atomicwrites/commit/4d12f23227b6a944ab1d99c507a69fdbc7c9ed6d  # noqa
     "atomicwrites>=0.1.7",
     "aiohttp>=3.8.0,<4.0.0",

vdirsyncer/http.py

@@ -10,7 +10,6 @@ import aiohttp
 import requests.auth
 from requests.utils import parse_dict_header
 
-from . import DOCS_HOME
 from . import __version__
 from . import exceptions
 from .utils import expand_path
@@ -19,28 +18,6 @@ logger = logging.getLogger(__name__)
 USERAGENT = f"vdirsyncer/{__version__}"
 
 
-def _detect_faulty_requests():  # pragma: no cover
-    text = (
-        "Error during import: {e}\n\n"
-        "If you have installed vdirsyncer from a distro package, please file "
-        "a bug against that package, not vdirsyncer.\n\n"
-        "Consult {d}/problems.html#requests-related-importerrors"
-        "-based-distributions on how to work around this."
-    )
-
-    try:
-        from requests_toolbelt.auth.guess import GuessAuth  # noqa
-    except ImportError as e:
-        import sys
-
-        print(text.format(e=str(e), d=DOCS_HOME), file=sys.stderr)
-        sys.exit(1)
-
-
-_detect_faulty_requests()
-del _detect_faulty_requests
-
-
 class AuthMethod(ABC):
     def __init__(self, username, password):
         self.username = username