Simplify tests/test_custom_schema_fields.py

Co-authored-by: Motov Yurii <109919500+YuriiMotov@users.noreply.github.com>

tests/test_custom_schema_fields.py

@@ -55,18 +55,13 @@ item_schema = {
             "title": "Name",
             "type": "string",
         },
-        "description": (
+        "description": {
-            {
             "title": "Description",
-                "type": IsList("string", "null", check_order=False),
+            "type": (
-            }
+                IsList("string", "null", check_order=False) if PYDANTIC_V2 else "string"
-            if PYDANTIC_V2
-            else {
-                "title": "Description",
-                "type": "string",
-            }
             ),
         },
+    },
 }