docs: remove headings with on items

kenjis · kenjis · commit c533a038ffcc · 2023-08-25T09:39:28.000+09:00
diff --git a/user_guide_src/source/installation/upgrade_438.rst b/user_guide_src/source/installation/upgrade_438.rst
@@ -12,15 +12,6 @@ Please refer to the upgrade instructions corresponding to your installation meth
     :local:
     :depth: 2
 
-Mandatory File Changes
-**********************
-
-Breaking Changes
-****************
-
-Breaking Enhancements
-*********************
-
 Project Files
 *************
 
