diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index d92c5ad8035..26a285de274 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -11,7 +11,8 @@ updates:
     schedule:
       interval: "weekly"
 
-  - package-ecosystem: "gitsubmodule"
-    directory: "/"
-    schedule:
-      interval: "weekly"
+# FIXME: Need other way to update OAS.
+  # - package-ecosystem: "gitsubmodule"
+  #   directory: "/"
+  #   schedule:
+  #     interval: "weekly"
diff --git a/.gitmodules b/.gitmodules
deleted file mode 100644
index cfdc733eb75..00000000000
--- a/.gitmodules
+++ /dev/null
@@ -1,4 +0,0 @@
-[submodule "Submodule/github/rest-api-description"]
-	path = Submodule/github/rest-api-description
-	url = https://github.com/github/rest-api-description.git
-	shallow = true
diff --git a/Submodule/github/rest-api-description b/Submodule/github/rest-api-description
deleted file mode 160000
index 38baa7aebf2..00000000000
--- a/Submodule/github/rest-api-description
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 38baa7aebf29fe927aac6aa0ae769b7a8d3204ca