CLN: remove have_pytz? #17251
Description
From tslib.pyx
try: import pytz UTC = pytz.utc have_pytz = True except: have_pytz = False [...] def tz_convert_single(int64_t val, object tz1, object tz2): [...] if not have_pytz: import pytz From much earlier in tslib.pyx
from pytz.tzinfo import BaseTzInfo as _pytz_BaseTzInfo Is the try/except still necessary? If so, is import pytz the right thing to do in tz_convert_single?