manual_retain: Remove redundant match.

Author: Jarcho

clippy_lints/src/manual_retain.rs

@@ -70,9 +70,8 @@ impl_lint_pass!(ManualRetain => [MANUAL_RETAIN]);
 impl<'tcx> LateLintPass<'tcx> for ManualRetain {
     fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'_>) {
         if let Assign(left_expr, collect_expr, _) = &expr.kind
-            && let hir::ExprKind::MethodCall(seg, ..) = &collect_expr.kind
+            && let hir::ExprKind::MethodCall(seg, target_expr, [], _) = &collect_expr.kind
             && seg.args.is_none()
-            && let hir::ExprKind::MethodCall(_, target_expr, [], _) = &collect_expr.kind
             && let Some(collect_def_id) = cx.typeck_results().type_dependent_def_id(collect_expr.hir_id)
             && cx.tcx.is_diagnostic_item(sym::iterator_collect_fn, collect_def_id)
         {