diff --git a/readthedocs/notifications/migrations/0004_remove_unused_notification.py b/readthedocs/notifications/migrations/0004_remove_unused_notification.py
new file mode 100644
index 00000000000..432da6772cd
--- /dev/null
+++ b/readthedocs/notifications/migrations/0004_remove_unused_notification.py
@@ -0,0 +1,23 @@
+# Generated by Django 4.2.16 on 2024-10-29 16:27
+
+from django.db import migrations
+from django_safemigrate import Safe
+
+
+def remove_unused_notification(apps, schema_editor):
+    Notification = apps.get_model("notifications", "Notification")
+    Notification.objects.filter(
+        message_id="oauth:deploy-key:attached-successfully"
+    ).delete()
+
+
+class Migration(migrations.Migration):
+    safe = Safe.after_deploy
+
+    dependencies = [
+        ("notifications", "0003_notification_indexes"),
+    ]
+
+    operations = [
+        migrations.RunPython(remove_unused_notification),
+    ]
diff --git a/readthedocs/oauth/notifications.py b/readthedocs/oauth/notifications.py
index 15d53eab5fe..b05f539b83b 100644
--- a/readthedocs/oauth/notifications.py
+++ b/readthedocs/oauth/notifications.py
@@ -4,16 +4,13 @@
 
 from django.utils.translation import gettext_lazy as _
 
-from readthedocs.notifications.constants import ERROR, INFO
+from readthedocs.notifications.constants import ERROR
 from readthedocs.notifications.messages import Message, registry
 
 MESSAGE_OAUTH_WEBHOOK_NO_PERMISSIONS = "oauth:webhook:no-permissions"
 MESSAGE_OAUTH_WEBHOOK_NO_ACCOUNT = "oauth:webhook:no-account"
 MESSAGE_OAUTH_WEBHOOK_INVALID = "oauth:webhook:invalid"
 MESSAGE_OAUTH_BUILD_STATUS_FAILURE = "oauth:status:send-failed"
-MESSAGE_OAUTH_DEPLOY_KEY_ATTACHED_SUCCESSFULLY = (
-    "oauth:deploy-key:attached-successfully"
-)
 MESSAGE_OAUTH_DEPLOY_KEY_ATTACHED_FAILED = "oauth:deploy-key:attached-failed"
 
 messages = [
@@ -72,18 +69,6 @@
         ),
         type=ERROR,
     ),
-    Message(
-        id=MESSAGE_OAUTH_DEPLOY_KEY_ATTACHED_SUCCESSFULLY,
-        header=_("Deploy key added successfully"),
-        body=_(
-            textwrap.dedent(
-                """
-            Successfully added deploy key to {{provider_name}} project.
-            """
-            ).strip(),
-        ),
-        type=INFO,
-    ),
     Message(
         id=MESSAGE_OAUTH_DEPLOY_KEY_ATTACHED_FAILED,
         header=_("Failed to add deploy key to project"),