diff --git a/crates/hir_ty/src/lib.rs b/crates/hir_ty/src/lib.rs
index 945b4b0e4a6..8729b52ae8b 100644
--- a/crates/hir_ty/src/lib.rs
+++ b/crates/hir_ty/src/lib.rs
@@ -217,7 +217,6 @@ pub fn make_canonical<T: HasInterner<Interner = Interner>>(
 pub struct CallableSig {
     params_and_return: Arc<[Ty]>,
     is_varargs: bool,
-    legacy_const_generics_indices: Arc<[u32]>,
 }
 
 has_interner!(CallableSig);
@@ -228,11 +227,7 @@ pub type PolyFnSig = Binders<CallableSig>;
 impl CallableSig {
     pub fn from_params_and_return(mut params: Vec<Ty>, ret: Ty, is_varargs: bool) -> CallableSig {
         params.push(ret);
-        CallableSig {
-            params_and_return: params.into(),
-            is_varargs,
-            legacy_const_generics_indices: Arc::new([]),
-        }
+        CallableSig { params_and_return: params.into(), is_varargs }
     }
 
     pub fn from_fn_ptr(fn_ptr: &FnPointer) -> CallableSig {
@@ -249,14 +244,9 @@ impl CallableSig {
                 .map(|arg| arg.assert_ty_ref(Interner).clone())
                 .collect(),
             is_varargs: fn_ptr.sig.variadic,
-            legacy_const_generics_indices: Arc::new([]),
         }
     }
 
-    pub fn set_legacy_const_generics_indices(&mut self, indices: &[u32]) {
-        self.legacy_const_generics_indices = indices.into();
-    }
-
     pub fn to_fn_ptr(&self) -> FnPointer {
         FnPointer {
             num_binders: 0,
@@ -287,11 +277,7 @@ impl Fold<Interner> for CallableSig {
     ) -> Result<Self::Result, E> {
         let vec = self.params_and_return.to_vec();
         let folded = vec.fold_with(folder, outer_binder)?;
-        Ok(CallableSig {
-            params_and_return: folded.into(),
-            is_varargs: self.is_varargs,
-            legacy_const_generics_indices: self.legacy_const_generics_indices,
-        })
+        Ok(CallableSig { params_and_return: folded.into(), is_varargs: self.is_varargs })
     }
 }
 
diff --git a/crates/hir_ty/src/lower.rs b/crates/hir_ty/src/lower.rs
index 41bb94c5d55..d0226cec263 100644
--- a/crates/hir_ty/src/lower.rs
+++ b/crates/hir_ty/src/lower.rs
@@ -1364,10 +1364,7 @@ fn fn_sig_for_fn(db: &dyn HirDatabase, def: FunctionId) -> PolyFnSig {
         .with_type_param_mode(ParamLoweringMode::Variable);
     let ret = ctx_ret.lower_ty(&data.ret_type);
     let generics = generics(db.upcast(), def.into());
-    let mut sig = CallableSig::from_params_and_return(params, ret, data.is_varargs());
-    if !data.legacy_const_generics_indices.is_empty() {
-        sig.set_legacy_const_generics_indices(&data.legacy_const_generics_indices);
-    }
+    let sig = CallableSig::from_params_and_return(params, ret, data.is_varargs());
     make_binders(db, &generics, sig)
 }