diff --git a/core_15.txt b/core_15.txt
deleted file mode 100644
index 1442b7ff..00000000
--- a/core_15.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-2018-05-19 /office/docbook/xmlto/pspec.xml
-2017-01-24 /office/docbook/sgml-common/pspec.xml
-2017-01-24 /office/docbook/docbook-xml/pspec.xml