fix: Update metaschema, schema structure tests

Author: effigies

src/metaschema.json

@@ -459,9 +459,6 @@
           "type": "array",
           "items": { "type": "string" }
         },
-        "dataset_metadata": {
-          "type": "object"
-        },
         "directories": {
           "type": "object"
         },
@@ -513,7 +510,6 @@
         "tabular_data",
         "metaentities",
         "common_principles",
-        "dataset_metadata",
         "directories",
         "errors",
         "modalities"

tools/schemacode/src/bidsschematools/tests/test_expressions.py

@@ -57,7 +57,7 @@ def test_selectors(schema_obj):
     # For directories of files, need to look three down
     for rules, level in (
         (schema_obj.rules.checks, 3),
-        (schema_obj.rules.dataset_metadata, 2),
+        (schema_obj.rules.json, 3),
         (schema_obj.rules.sidecars, 3),
         (schema_obj.rules.tabular_data, 3),
         (schema_obj.rules.errors, 2),