diff --git a/.gitignore b/.gitignore
index 8ea0fdad..11390af2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -70,3 +70,6 @@ Thumbs.db
 
 # Python caches
 __pycache__/
+
+# DuckStation oracle (local-only; private fork at git@github.com:mstan/duckstation.git)
+/duckstation/
diff --git a/.gitmodules b/.gitmodules
deleted file mode 100644
index 0723e81e..00000000
--- a/.gitmodules
+++ /dev/null
@@ -1,3 +0,0 @@
-[submodule "duckstation"]
-	path = duckstation
-	url = https://github.com/stenzek/duckstation.git
diff --git a/duckstation b/duckstation
deleted file mode 160000
index d718da8d..00000000
--- a/duckstation
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit d718da8d9cc738e8f7f140ee37bef2733fe78630