Remove dot hint when the issue is a missing key in a map (#13519)

Author: sabiwara

lib/elixir/lib/module/types/of.ex

@@ -518,7 +518,7 @@ defmodule Module.Types.Of do
           #{to_quoted_string(type)}
       """,
       traces,
-      format_hints([:dot | trace_hints]),
+      format_hints(trace_hints),
       "\ntyping violation found at:"
     ]
   end

lib/elixir/test/elixir/module/types/expr_test.exs

@@ -260,8 +260,6 @@ defmodule Module.Types.ExprTest do
 
                     %Point{x: nil, y: nil, z: integer()}
 
-                #{hints(:dot)}
-
                 typing violation found at:\
                 """}
     end