CLN: unused imports in tslibs (#35133)

Author: jbrockmendel

pandas/_libs/tslibs/offsets.pyx

@@ -51,7 +51,6 @@ from pandas._libs.tslibs.timezones cimport utc_pytz as UTC
 from pandas._libs.tslibs.tzconversion cimport tz_convert_single
 
 from .dtypes cimport PeriodDtypeCode
-from .fields import get_start_end_field
 from .timedeltas cimport delta_to_nanoseconds
 from .timedeltas import Timedelta
 from .timestamps cimport _Timestamp
@@ -99,12 +98,6 @@ def apply_index_wraps(func):
     # do @functools.wraps(func) manually since it doesn't work on cdef funcs
     wrapper.__name__ = func.__name__
     wrapper.__doc__ = func.__doc__
-    try:
-        wrapper.__module__ = func.__module__
-    except AttributeError:
-        # AttributeError: 'method_descriptor' object has no
-        # attribute '__module__'
-        pass
     return wrapper
 
 
@@ -159,12 +152,6 @@ def apply_wraps(func):
     # do @functools.wraps(func) manually since it doesn't work on cdef funcs
     wrapper.__name__ = func.__name__
     wrapper.__doc__ = func.__doc__
-    try:
-        wrapper.__module__ = func.__module__
-    except AttributeError:
-        # AttributeError: 'method_descriptor' object has no
-        # attribute '__module__'
-        pass
     return wrapper
 
 
@@ -355,8 +342,7 @@ class ApplyTypeError(TypeError):
 
 cdef class BaseOffset:
     """
-    Base class for DateOffset methods that are not overridden by subclasses
-    and will (after pickle errors are resolved) go into a cdef class.
+    Base class for DateOffset methods that are not overridden by subclasses.
     """
     _day_opt = None
     _attributes = tuple(["n", "normalize"])

pandas/_libs/tslibs/timestamps.pyx

@@ -14,7 +14,7 @@ from numpy cimport int64_t, int8_t, uint8_t, ndarray
 cnp.import_array()
 
 from cpython.object cimport (PyObject_RichCompareBool, PyObject_RichCompare,
-                             Py_GT, Py_GE, Py_EQ, Py_NE, Py_LT, Py_LE)
+                             Py_EQ, Py_NE)
 
 from cpython.datetime cimport (
     datetime,
@@ -51,7 +51,7 @@ from pandas._libs.tslibs.np_datetime cimport (
     pydatetime_to_dt64,
 )
 from pandas._libs.tslibs.np_datetime import OutOfBoundsDatetime
-from pandas._libs.tslibs.offsets cimport to_offset, is_tick_object, is_offset_object
+from pandas._libs.tslibs.offsets cimport to_offset, is_offset_object
 from pandas._libs.tslibs.timedeltas cimport is_any_td_scalar, delta_to_nanoseconds
 from pandas._libs.tslibs.timedeltas import Timedelta
 from pandas._libs.tslibs.timezones cimport (