fix warning ty::tykind usage

Author: t-webber

clippy_lints/src/manual_unwrap_or_default.rs

@@ -2,7 +2,7 @@ use rustc_errors::Applicability;
 use rustc_hir::def::Res;
 use rustc_hir::{Arm, Expr, ExprKind, HirId, LangItem, MatchSource, Pat, PatKind, QPath};
 use rustc_lint::{LateContext, LateLintPass, LintContext};
-use rustc_middle::ty::{GenericArgKind, TyKind};
+use rustc_middle::ty::{self, GenericArgKind};
 use rustc_session::declare_lint_pass;
 use rustc_span::sym;
 
@@ -154,7 +154,7 @@ fn handle<'tcx>(cx: &LateContext<'tcx>, if_let_or_match: IfLetOrMatch<'tcx>, exp
 
     // We check if the expression is not a method or function with a unspecified return type
     if let ExprKind::MethodCall(_, expr, _, _) = &condition.kind {
-        if let TyKind::Adt(_, substs) = cx.typeck_results().expr_ty(expr).kind() {
+        if let ty::Adt(_, substs) = cx.typeck_results().expr_ty(expr).kind() {
             if let Some(ok_type) = substs.get(0) {
                 if let Some(receiver) = Sugg::hir_opt(cx, condition).map(Sugg::maybe_par) {
                     return span_lint_and_sugg(