diff --git a/.upgrade.yml b/.upgrade.yml
deleted file mode 100644
index cde0303..0000000
--- a/.upgrade.yml
+++ /dev/null
@@ -1,3 +0,0 @@
-mappings:
-  IFramePage: SilverStripe\IFrame\IFramePage
-  IFramePage_Controller: SilverStripe\IFrame\IFramePageController
diff --git a/_config/legacy.yml b/_config/legacy.yml
deleted file mode 100644
index 9e9e7ed..0000000
--- a/_config/legacy.yml
+++ /dev/null
@@ -1,6 +0,0 @@
----
-Name: iframelegacy
----
-SilverStripe\ORM\DatabaseAdmin:
-  classname_value_remapping:
-    IFramePage: 'SilverStripe\IFrame\IFramePage'