Revert "Remove unused require"

This reverts commit 95a4466.

Author: sabiwara

lib/mint/core/transport/ssl.ex

@@ -1,6 +1,7 @@
 defmodule Mint.Core.Transport.SSL do
   @moduledoc false
 
+  require Logger
   require Record
 
   @behaviour Mint.Core.Transport

test/mint/unix_socket_test.exs

@@ -3,6 +3,8 @@ defmodule Mint.UnixSocketTest do
 
   alias Mint.{HTTP, TestSocketServer}
 
+  require HTTP
+
   unix? = match?({:unix, _}, :os.type())
   otp_19? = System.otp_release() >= "19"
   @moduletag skip: not (unix? and otp_19?)