remove SingleConstructorOffset

Author: MarcoGorelli

pandas-stubs/_libs/tslibs/offsets.pyi

@@ -89,10 +89,7 @@ class BaseOffset:
     @property
     def nanos(self) -> int: ...
 
-class SingleConstructorOffset(BaseOffset):
-    def __reduce__(self): ...
-
-class Tick(SingleConstructorOffset):
+class Tick(BaseOffset):
     def __init__(self, n: int = ..., normalize: bool = ...) -> None: ...
     @property
     def nanos(self) -> int: ...
@@ -115,7 +112,7 @@ class BusinessDay(BaseOffset):
     ) -> None: ...
     def __reduce__(self): ...
 
-class BusinessHour(SingleConstructorOffset):
+class BusinessHour(BaseOffset):
     def __init__(
         self,
         n: int = ...,
@@ -125,12 +122,12 @@ class BusinessHour(SingleConstructorOffset):
         offset: timedelta = ...,
     ) -> None: ...
 
-class WeekOfMonthMixin(SingleConstructorOffset):
+class WeekOfMonthMixin(BaseOffset):
     def __init__(
         self, n: int = ..., weekday: Literal[0, 1, 2, 3, 4, 5, 6] = ...
     ) -> None: ...
 
-class YearOffset(SingleConstructorOffset):
+class YearOffset(BaseOffset):
     def __init__(
         self, n: int = ..., normalize: bool = ..., month: int | None = ...
     ) -> None: ...
@@ -140,7 +137,7 @@ class BYearBegin(YearOffset): ...
 class YearEnd(YearOffset): ...
 class YearBegin(YearOffset): ...
 
-class QuarterOffset(SingleConstructorOffset):
+class QuarterOffset(BaseOffset):
     def __init__(
         self, n: int = ..., normalize: bool = ..., startingMonth: int | None = ...
     ) -> None: ...
@@ -149,21 +146,21 @@ class BQuarterEnd(QuarterOffset): ...
 class BQuarterBegin(QuarterOffset): ...
 class QuarterEnd(QuarterOffset): ...
 class QuarterBegin(QuarterOffset): ...
-class MonthOffset(SingleConstructorOffset): ...
+class MonthOffset(BaseOffset): ...
 class MonthEnd(MonthOffset): ...
 class MonthBegin(MonthOffset): ...
 class BusinessMonthEnd(MonthOffset): ...
 class BusinessMonthBegin(MonthOffset): ...
 
-class SemiMonthOffset(SingleConstructorOffset):
+class SemiMonthOffset(BaseOffset):
     def __init__(
         self, n: int = ..., normalize: bool = ..., day_of_month: int | None = ...
     ) -> None: ...
 
 class SemiMonthEnd(SemiMonthOffset): ...
 class SemiMonthBegin(SemiMonthOffset): ...
 
-class Week(SingleConstructorOffset):
+class Week(BaseOffset):
     def __init__(
         self, n: int = ..., normalize: bool = ..., weekday: int | None = ...
     ) -> None: ...
@@ -175,7 +172,7 @@ class WeekOfMonth(WeekOfMonthMixin):
 
 class LastWeekOfMonth(WeekOfMonthMixin): ...
 
-class FY5253Mixin(SingleConstructorOffset):
+class FY5253Mixin(BaseOffset):
     def __init__(
         self,
         n: int = ...,
@@ -187,9 +184,9 @@ class FY5253Mixin(SingleConstructorOffset):
 
 class FY5253(FY5253Mixin): ...
 class FY5253Quarter(FY5253Mixin): ...
-class Easter(SingleConstructorOffset): ...
+class Easter(BaseOffset): ...
 
-class _CustomBusinessMonth(SingleConstructorOffset):
+class _CustomBusinessMonth(BaseOffset):
     def __init__(
         self,
         n: int = ...,

pandas-stubs/core/dtypes/dtypes.pyi

@@ -10,11 +10,8 @@ from pandas.core.series import Series
 
 from pandas._libs import NaTType
 from pandas._libs.tslibs import BaseOffset
-from pandas._libs.tslibs.offsets import (
-    RelativeDeltaOffset,
-    SingleConstructorOffset,
-)
 from pandas._typing import (
+    Frequency,
     Ordered,
     TimeZones,
     npt,
@@ -49,9 +46,7 @@ class DatetimeTZDtype(PandasExtensionDtype):
     def na_value(self) -> NaTType: ...
 
 class PeriodDtype(PandasExtensionDtype):
-    def __init__(
-        self, freq: str | SingleConstructorOffset | RelativeDeltaOffset = ...
-    ) -> None: ...
+    def __init__(self, freq: Frequency = ...) -> None: ...
     @property
     def freq(self) -> BaseOffset: ...
     @property