diff --git a/src/metaschema.json b/src/metaschema.json
index 5d01c8862f..a3e500dad7 100644
--- a/src/metaschema.json
+++ b/src/metaschema.json
@@ -751,10 +751,6 @@
       "type": "object",
       "properties": {
         "level": { "enum": ["optional", "recommended", "required"] },
-        "datatypes": {
-          "type": "array",
-          "items": { "pattern": "^[a-z]+$" }
-        },
         "stem": { "type": "string" },
         "extensions": { "type": "array", "items": { "type": "string" } }
       },