Minor simplification

Author: ChayimFriedman2

crates/hir-ty/src/lib.rs

@@ -62,7 +62,7 @@ use std::{hash::Hash, ops::ControlFlow};
 
 use hir_def::{
     CallableDefId, ExpressionStoreOwnerId, GenericDefId, TypeAliasId, TypeOrConstParamId,
-    TypeParamId, hir::generics::GenericParams, resolver::TypeNs, type_ref::Rawness,
+    TypeParamId, resolver::TypeNs, type_ref::Rawness,
 };
 use hir_expand::name::Name;
 use indexmap::{IndexMap, map::Entry};
@@ -495,10 +495,7 @@ pub fn associated_type_shorthand_candidates(
         TypeNs::GenericParam(param) => (def, param),
         TypeNs::SelfType(impl_) => {
             let impl_trait = db.impl_trait(impl_)?.skip_binder().def_id.0;
-            let param = TypeParamId::from_unchecked(TypeOrConstParamId {
-                parent: impl_trait.into(),
-                local_id: GenericParams::SELF_PARAM_ID_IN_SELF,
-            });
+            let param = TypeParamId::trait_self(impl_trait);
             (impl_trait.into(), param)
         }
         _ => return None,