Revert "Fix TI level 2 callout to use FFDCFormat::JSON instead of Custom"

This reverts commit 216ff9f1e5b1563c571aa41ff7412420d00a0c01.

Change-Id: Ied752866f76a83b8da4d7577d363175a6f06c475
Signed-off-by: Zane Shelley <zshelle@us.ibm.com>
diff --git a/attn/attn_logging.cpp b/attn/attn_logging.cpp
index f2873da..db14a92 100644
--- a/attn/attn_logging.cpp
+++ b/attn/attn_logging.cpp
@@ -484,12 +484,11 @@
     auto userData = createFFDCFiles(i_tiInfoData, tiInfoSize);
 
     // Per request from the Hostboot team. Add a level 2 callout.
-    userData.emplace_back(util::FFDCFormat::JSON, 0xCA, 0x01);
+    userData.emplace_back(util::FFDCFormat::Custom, 0xCA, 0x01);
     std::ofstream o{userData.back().getPath()};
     o << nlohmann::json::parse(R"(
         [ { "Procedure": "next_level_support", "Priority": "L" } ]
     )");
-    o.close();
 
     event(EventType::Terminate, i_additionalData, userData);
 }