diff --git a/vm/src/sliceable.rs b/vm/src/sliceable.rs
index 0eb5fd1bea..b17f49b93e 100644
--- a/vm/src/sliceable.rs
+++ b/vm/src/sliceable.rs
@@ -6,7 +6,7 @@ use crate::builtins::int::PyInt;
 use crate::builtins::slice::{PySlice, PySliceRef};
 use crate::utils::Either;
 use crate::VirtualMachine;
-use crate::{PyObjectRef, PyResult, TryFromObject, TypeProtocol};
+use crate::{PyObjectRef, PyResult, TypeProtocol};
 
 pub trait PySliceableSequenceMut {
     type Item: Clone;
@@ -359,12 +359,6 @@ impl SequenceIndex {
     }
 }
 
-impl TryFromObject for SequenceIndex {
-    fn try_from_object(vm: &VirtualMachine, obj: PyObjectRef) -> PyResult<Self> {
-        Self::try_from_object_for(vm, obj, "sequence")
-    }
-}
-
 /// Get the index into a sequence like type. Get it from a python integer
 /// object, accounting for negative index, and out of bounds issues.
 // pub fn get_sequence_index(vm: &VirtualMachine, index: &PyIntRef, length: usize) -> PyResult<usize> {