test: use <|> at binop_lazy test

tests/lean/binop_lazy.lean

@@ -1,20 +1,10 @@
-class HOrElse' (α : Type u) (β : Type v) (γ : outParam (Type w)) where
-  hOrElse' : α → (Unit → β) → γ
-
-infixr:20  " <%> " => HOrElse.hOrElse'
-
-macro_rules | `($x <%> $y) => `(binop_lazy% HOrElse'.hOrElse' $x $y)
-
-instance : HOrElse' (IO α) (IO α) (IO α) where
-  hOrElse' a b := try a catch _ => b ()
-
 def f : IO Unit :=
   (do IO.println "case 1"; throw (IO.userError "failed"))
-  <%>
+  <|>
   (do IO.println "case 2"; throw (IO.userError "failed"))
-  <%>
+  <|>
   (do IO.println "case 3")
-  <%>
+  <|>
   (let x := dbg_trace "hello"; 1
    IO.println x)