Disable SubmarineFree again

manifests/SubmarineFree.json

@@ -5,7 +5,5 @@
   "sourceUrl": "https://github.com/david-c14/SubmarineFree/",
   "manualUrl": "https://github.com/david-c14/SubmarineFree/blob/master/manual/index.md",
   "repoVersion": "0.6.4",
-  "buildTimestamp": 1528839267,
-  "latestVersion": "0.6.4",
-  "status": "available"
-}
+  "buildTimestamp": 1528839267
+}