diff --git a/Cargo.toml b/Cargo.toml
index 6383bab158d..732e066c7dc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,9 +36,6 @@ rustversion = "1.0"
 default = ["macros"]
 macros = ["ctor", "indoc", "inventory", "paste", "pyo3cls", "unindent"]
 
-# Supports arrays of arbitrary size
-const-generics = []
-
 # Optimizes PyObject to Vec conversion and so on.
 nightly = []
 
diff --git a/src/lib.rs b/src/lib.rs
index 5bd29ae0169..10f3e768f8e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,3 @@
-#![cfg_attr(feature = "const-generics", feature(min_const_generics))]
-#![cfg_attr(feature = "nightly", allow(incomplete_features))]
 #![cfg_attr(feature = "nightly", feature(specialization))]
 #![allow(clippy::missing_safety_doc)] // FIXME (#698)
 
diff --git a/src/types/list.rs b/src/types/list.rs
index a23940936b6..406d4d82aca 100644
--- a/src/types/list.rs
+++ b/src/types/list.rs
@@ -178,7 +178,6 @@ where
     }
 }
 
-#[cfg(feature = "const-generics")]
 impl<T, const N: usize> IntoPy<PyObject> for [T; N]
 where
     T: ToPyObject,
@@ -188,28 +187,6 @@ where
     }
 }
 
-#[cfg(not(feature = "const-generics"))]
-macro_rules! array_impls {
-    ($($N:expr),+) => {
-        $(
-            impl<T> IntoPy<PyObject> for [T; $N]
-            where
-                T: ToPyObject
-            {
-                fn into_py(self, py: Python) -> PyObject {
-                    self.as_ref().to_object(py)
-                }
-            }
-        )+
-    }
-}
-
-#[cfg(not(feature = "const-generics"))]
-array_impls!(
-    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
-    26, 27, 28, 29, 30, 31, 32
-);
-
 impl<T> ToPyObject for Vec<T>
 where
     T: ToPyObject,
diff --git a/src/types/mod.rs b/src/types/mod.rs
index 72f2b782515..baa483dc20b 100644
--- a/src/types/mod.rs
+++ b/src/types/mod.rs
@@ -236,13 +236,11 @@ mod string;
 mod tuple;
 mod typeobject;
 
-#[cfg(feature = "const-generics")]
 struct ArrayGuard<T, const N: usize> {
     dst: *mut T,
     initialized: usize,
 }
 
-#[cfg(feature = "const-generics")]
 impl<T, const N: usize> Drop for ArrayGuard<T, N> {
     fn drop(&mut self) {
         debug_assert!(self.initialized <= N);
@@ -253,7 +251,6 @@ impl<T, const N: usize> Drop for ArrayGuard<T, N> {
     }
 }
 
-#[cfg(feature = "const-generics")]
 fn try_create_array<E, F, T, const N: usize>(mut cb: F) -> Result<[T; N], E>
 where
     F: FnMut(usize) -> Result<T, E>,
diff --git a/src/types/sequence.rs b/src/types/sequence.rs
index f4dc1d78062..dc62fc28db0 100644
--- a/src/types/sequence.rs
+++ b/src/types/sequence.rs
@@ -257,7 +257,6 @@ impl PySequence {
     }
 }
 
-#[cfg(feature = "const-generics")]
 impl<'a, T, const N: usize> FromPyObject<'a> for [T; N]
 where
     T: FromPyObject<'a>,
@@ -273,7 +272,6 @@ where
     }
 }
 
-#[cfg(all(feature = "const-generics", feature = "nightly"))]
 impl<'source, T, const N: usize> FromPyObject<'source> for [T; N]
 where
     for<'a> T: FromPyObject<'a> + crate::buffer::Element,
@@ -291,59 +289,6 @@ where
     }
 }
 
-#[cfg(not(feature = "const-generics"))]
-macro_rules! array_impls {
-    ($($N:expr),+) => {
-        $(
-            impl<'a, T> FromPyObject<'a> for [T; $N]
-            where
-                T: Copy + Default + FromPyObject<'a>,
-            {
-                #[cfg(not(feature = "nightly"))]
-                fn extract(obj: &'a PyAny) -> PyResult<Self> {
-                    let mut array = [T::default(); $N];
-                    extract_sequence_into_slice(obj, &mut array)?;
-                    Ok(array)
-                }
-
-                #[cfg(feature = "nightly")]
-                default fn extract(obj: &'a PyAny) -> PyResult<Self> {
-                    let mut array = [T::default(); $N];
-                    extract_sequence_into_slice(obj, &mut array)?;
-                    Ok(array)
-                }
-            }
-
-            #[cfg(feature = "nightly")]
-            impl<'source, T> FromPyObject<'source> for [T; $N]
-            where
-                for<'a> T: Default + FromPyObject<'a> + crate::buffer::Element,
-            {
-                fn extract(obj: &'source PyAny) -> PyResult<Self> {
-                    let mut array = [T::default(); $N];
-                    // first try buffer protocol
-                    if let Ok(buf) = crate::buffer::PyBuffer::get(obj) {
-                        if buf.dimensions() == 1 && buf.copy_to_slice(obj.py(), &mut array).is_ok() {
-                            buf.release(obj.py());
-                            return Ok(array);
-                        }
-                        buf.release(obj.py());
-                    }
-                    // fall back to sequence protocol
-                    extract_sequence_into_slice(obj, &mut array)?;
-                    Ok(array)
-                }
-            }
-        )+
-    }
-}
-
-#[cfg(not(feature = "const-generics"))]
-array_impls!(
-    0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
-    26, 27, 28, 29, 30, 31, 32
-);
-
 impl<'a, T> FromPyObject<'a> for Vec<T>
 where
     T: FromPyObject<'a>,
@@ -379,7 +324,6 @@ where
     }
 }
 
-#[cfg(feature = "const-generics")]
 fn create_array_from_obj<'s, T, const N: usize>(obj: &'s PyAny) -> PyResult<[T; N]>
 where
     T: FromPyObject<'s>,
@@ -406,23 +350,6 @@ where
     Ok(v)
 }
 
-#[cfg(not(feature = "const-generics"))]
-fn extract_sequence_into_slice<'s, T>(obj: &'s PyAny, slice: &mut [T]) -> PyResult<()>
-where
-    T: FromPyObject<'s>,
-{
-    let seq = <PySequence as PyTryFrom>::try_from(obj)?;
-    if seq.len()? as usize != slice.len() {
-        return Err(exceptions::PyBufferError::py_err(
-            "Slice length does not match buffer length.",
-        ));
-    }
-    for (value, item) in slice.iter_mut().zip(seq.iter()?) {
-        *value = item?.extract::<T>()?;
-    }
-    Ok(())
-}
-
 impl<'v> PyTryFrom<'v> for PySequence {
     fn try_from<V: Into<&'v PyAny>>(value: V) -> Result<&'v PySequence, PyDowncastError<'v>> {
         let value = value.into();