diff --git a/pandas/_libs/algos.pyi b/pandas/_libs/algos.pyi
index 0cc9209fbdfc5..29d1365cad6fc 100644
--- a/pandas/_libs/algos.pyi
+++ b/pandas/_libs/algos.pyi
@@ -129,18 +129,11 @@ def diff_2d(
 ) -> None: ...
 def ensure_platform_int(arr: object) -> npt.NDArray[np.intp]: ...
 def ensure_object(arr: object) -> npt.NDArray[np.object_]: ...
-def ensure_complex64(arr: object, copy=...) -> npt.NDArray[np.complex64]: ...
-def ensure_complex128(arr: object, copy=...) -> npt.NDArray[np.complex128]: ...
 def ensure_float64(arr: object, copy=...) -> npt.NDArray[np.float64]: ...
-def ensure_float32(arr: object, copy=...) -> npt.NDArray[np.float32]: ...
 def ensure_int8(arr: object, copy=...) -> npt.NDArray[np.int8]: ...
 def ensure_int16(arr: object, copy=...) -> npt.NDArray[np.int16]: ...
 def ensure_int32(arr: object, copy=...) -> npt.NDArray[np.int32]: ...
 def ensure_int64(arr: object, copy=...) -> npt.NDArray[np.int64]: ...
-def ensure_uint8(arr: object, copy=...) -> npt.NDArray[np.uint8]: ...
-def ensure_uint16(arr: object, copy=...) -> npt.NDArray[np.uint16]: ...
-def ensure_uint32(arr: object, copy=...) -> npt.NDArray[np.uint32]: ...
-def ensure_uint64(arr: object, copy=...) -> npt.NDArray[np.uint64]: ...
 def take_1d_int8_int8(
     values: np.ndarray, indexer: npt.NDArray[np.intp], out: np.ndarray, fill_value=...
 ) -> None: ...