Don't test tls_options in adapter helper test.

test/http/adapter_helper/gun_test.exs

@@ -21,7 +21,6 @@ test "https url with default port" do
 
       opts = Gun.options([receive_conn: false], uri)
       assert opts[:certificates_verification]
-      assert opts[:tls_opts][:log_level] == :warning
     end
 
     test "https ipv4 with default port" do
@@ -29,7 +28,6 @@ test "https ipv4 with default port" do
 
       opts = Gun.options([receive_conn: false], uri)
       assert opts[:certificates_verification]
-      assert opts[:tls_opts][:log_level] == :warning
     end
 
     test "https ipv6 with default port" do
@@ -37,7 +35,6 @@ test "https ipv6 with default port" do
 
       opts = Gun.options([receive_conn: false], uri)
       assert opts[:certificates_verification]
-      assert opts[:tls_opts][:log_level] == :warning
     end
 
     test "https url with non standart port" do