diff --git a/sklearn/metrics/_dist_metrics.pyx b/sklearn/metrics/_dist_metrics.pyx
index c442be0398980..d17be2c8cb73d 100644
--- a/sklearn/metrics/_dist_metrics.pyx
+++ b/sklearn/metrics/_dist_metrics.pyx
@@ -29,7 +29,7 @@ from libc.math cimport fabs, sqrt, exp, pow, cos, sin, asin
 cdef DTYPE_t INF = np.inf
 
 from scipy.sparse import csr_matrix, issparse
-from ..utils._typedefs cimport DTYPE_t, ITYPE_t, DITYPE_t, DTYPECODE
+from ..utils._typedefs cimport DTYPE_t, ITYPE_t, DTYPECODE
 from ..utils._typedefs import DTYPE, ITYPE
 from ..utils._readonly_array_wrapper import ReadonlyArrayWrapper
 from ..utils import check_array
diff --git a/sklearn/metrics/_pairwise_distances_reduction.pyx b/sklearn/metrics/_pairwise_distances_reduction.pyx
index 29ac839187fc9..bbd640e4ae39c 100644
--- a/sklearn/metrics/_pairwise_distances_reduction.pyx
+++ b/sklearn/metrics/_pairwise_distances_reduction.pyx
@@ -40,7 +40,7 @@ from ..utils._cython_blas cimport (
 )
 from ..utils._heap cimport simultaneous_sort, heap_push
 from ..utils._openmp_helpers cimport _openmp_thread_num
-from ..utils._typedefs cimport ITYPE_t, DTYPE_t, DITYPE_t
+from ..utils._typedefs cimport ITYPE_t, DTYPE_t
 from ..utils._typedefs cimport ITYPECODE, DTYPECODE
 
 from numbers import Integral, Real
diff --git a/sklearn/utils/_typedefs.pxd b/sklearn/utils/_typedefs.pxd
index b121953d15e4e..c98a741efe25a 100644
--- a/sklearn/utils/_typedefs.pxd
+++ b/sklearn/utils/_typedefs.pxd
@@ -11,8 +11,3 @@ cdef enum:
 # Index/integer type.
 #  WARNING: ITYPE_t must be a signed integer type or you will have a bad time!
 ctypedef np.intp_t ITYPE_t  # WARNING: should match ITYPE in typedefs.pyx
-
-# Fused type for certain operations
-ctypedef fused DITYPE_t:
-    ITYPE_t
-    DTYPE_t