diff --git a/Documentation/Models/Docbook/Default/Book/Part.ent b/Documentation/Models/Docbook/Default/Book/Part.ent
deleted file mode 100644
index 7502d02..0000000
--- a/Documentation/Models/Docbook/Default/Book/Part.ent
+++ /dev/null
@@ -1,8 +0,0 @@
-<!-- Begin: Part entities definition -->
-<!-- End: Part entities definition -->
-
-<!-- Begin: Chapter entities definition -->
-<!-- End: Chapter entities definition -->
-
-<!-- Begin: Section entities definition -->
-<!-- End: Section entities definition -->
diff --git a/Documentation/Models/Docbook/Default/Book/Preface.ent b/Documentation/Models/Docbook/Default/Book/Preface.ent
deleted file mode 100644
index 3c9c37f..0000000
--- a/Documentation/Models/Docbook/Default/Book/Preface.ent
+++ /dev/null
@@ -1,4 +0,0 @@
-<!ENTITY preface            SYSTEM "Preface.docbook">
-<!ENTITY preface-overview   SYSTEM "Preface/overview.docbook">
-<!ENTITY preface-docconvs   SYSTEM "Preface/docconvs.docbook">
-<!ENTITY preface-feedback   SYSTEM "Preface/feedback.docbook">