CLN: Remove unused imports in pyx files

pandas/_libs/lib.pyx

@@ -1,6 +1,4 @@
 # cython: profile=False
-import operator
-
 cimport cython
 from cython cimport Py_ssize_t
 
@@ -29,7 +27,7 @@ from cpython.datetime cimport (PyDateTime_Check, PyDate_Check,
                                PyDateTime_IMPORT)
 PyDateTime_IMPORT
 
-from tslib import NaT, array_to_datetime
+from tslib import array_to_datetime
 from missing cimport checknull
 
 

pandas/_libs/missing.pyx

@@ -15,7 +15,6 @@ cimport util
 
 from tslibs.np_datetime cimport get_timedelta64_value, get_datetime64_value
 from tslibs.nattype import NaT
-from tslibs.nattype cimport is_null_datetimelike
 
 cdef double INF = <double> np.inf
 cdef double NEGINF = -INF

pandas/_libs/tslib.pyx

@@ -38,14 +38,13 @@ import pytz
 
 
 from tslibs.timedeltas cimport cast_from_unit
-from tslibs.timedeltas import Timedelta, ints_to_pytimedelta  # noqa:F841
 from tslibs.timezones cimport (is_utc, is_tzlocal, is_fixed_offset,
                                treat_tz_as_pytz, get_dst_info)
 from tslibs.conversion cimport (tz_convert_single, _TSObject,
                                 convert_datetime_to_tsobject,
                                 get_datetime64_nanos,
                                 tz_convert_utc_to_tzlocal)
-from tslibs.conversion import tz_convert_single, normalize_date  # noqa:F841
+from tslibs.conversion import tz_convert_single
 
 from tslibs.nattype import NaT, nat_strings, iNaT
 from tslibs.nattype cimport checknull_with_nat, NPY_NAT

pandas/_libs/tslibs/frequencies.pyx

@@ -5,7 +5,6 @@ import re
 cimport cython
 
 cimport numpy as cnp
-from numpy cimport int64_t
 cnp.import_array()
 
 from util cimport is_integer_object, is_string_object

pandas/_libs/tslibs/offsets.pyx

@@ -11,7 +11,6 @@ from cpython.datetime cimport (PyDateTime_IMPORT, PyDateTime_CheckExact,
 PyDateTime_IMPORT
 
 from dateutil.relativedelta import relativedelta
-from pytz import UTC
 
 import numpy as np
 cimport numpy as cnp
@@ -24,7 +23,6 @@ from util cimport is_string_object, is_integer_object
 from ccalendar import MONTHS, DAYS
 from ccalendar cimport get_days_in_month, dayofweek
 from conversion cimport tz_convert_single, pydt_to_i8, localize_pydatetime
-from frequencies cimport get_freq_code
 from nattype cimport NPY_NAT
 from np_datetime cimport (pandas_datetimestruct,
                           dtstruct_to_dt64, dt64_to_dtstruct)

pandas/_libs/tslibs/parsing.pyx

@@ -6,10 +6,6 @@ Parsing functions for datetime and datetime-like strings.
 import sys
 import re
 
-from cpython cimport PyString_Check, PyUnicode_Check
-
-from libc.stdlib cimport free
-
 cimport cython
 from cython cimport Py_ssize_t
 
@@ -34,7 +30,6 @@ else:
 # dateutil compat
 from dateutil.tz import (tzoffset,
                          tzlocal as _dateutil_tzlocal,
-                         tzfile as _dateutil_tzfile,
                          tzutc as _dateutil_tzutc,
                          tzstr as _dateutil_tzstr)
 from dateutil.relativedelta import relativedelta

pandas/_libs/tslibs/period.pyx

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # cython: profile=False
-from datetime import datetime, date, timedelta
+from datetime import datetime, date
 
 from cpython cimport (
     PyUnicode_Check,
@@ -37,7 +37,7 @@ cimport util
 from util cimport is_period_object, is_string_object, INT32_MIN
 
 from timestamps import Timestamp
-from timezones cimport is_utc, is_tzlocal, get_utcoffset, get_dst_info
+from timezones cimport is_utc, is_tzlocal, get_dst_info
 from timedeltas cimport delta_to_nanoseconds
 
 cimport ccalendar

pandas/_libs/tslibs/resolution.pyx

@@ -15,12 +15,10 @@ from pandas._libs.khash cimport (khiter_t,
                                  kh_init_int64, kh_int64_t,
                                  kh_resize_int64, kh_get_int64)
 
-from cpython.datetime cimport datetime
-
 from np_datetime cimport pandas_datetimestruct, dt64_to_dtstruct
 from frequencies cimport get_freq_code
 from timezones cimport (is_utc, is_tzlocal,
-                        maybe_get_tz, get_dst_info, get_utcoffset)
+                        maybe_get_tz, get_dst_info)
 from fields import build_field_sarray
 from conversion import tz_convert
 from conversion cimport tz_convert_utc_to_tzlocal

pandas/_libs/tslibs/strptime.pyx

@@ -31,7 +31,6 @@ import numpy as np
 from numpy cimport ndarray, int64_t
 
 from datetime import date as datetime_date
-from cpython.datetime cimport datetime
 
 from np_datetime cimport (check_dts_bounds,
                           dtstruct_to_dt64, pandas_datetimestruct)

pandas/_libs/window.pyx

@@ -20,8 +20,7 @@ cdef extern from "../src/headers/cmath" namespace "std":
 cimport util
 from util cimport numeric
 
-from skiplist cimport (IndexableSkiplist,
-                       node_t, skiplist_t,
+from skiplist cimport (skiplist_t,
                        skiplist_init, skiplist_destroy,
                        skiplist_get, skiplist_insert, skiplist_remove)