use external openlane
diff --git a/.gitmodules b/.gitmodules
index 489a9cf..a004792 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,3 @@
 [submodule "rapcores"]
 	path = rapcores
 	url = https://github.com/RAPcores/rapcores.git
-[submodule "openlane_repo"]
-	path = openlane_repo
-	url = https://github.com/RAPcores/openlane.git
diff --git a/openlane_repo b/openlane_repo
deleted file mode 160000
index 7e43f72..0000000
--- a/openlane_repo
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 7e43f72450dbfb968610f150be646628e65d3d2f