dynamite, neon: fix plain object deserialization

packages/dynamite/dynamite/lib/src/type_result/base.dart

@@ -21,13 +21,7 @@ class TypeResultBase extends TypeResult {
       name == 'String' ? object : '$object.toString()';
 
   @override
-  String deserialize(final String object, {final bool toBuilder = false}) {
+  String deserialize(final String object, {final bool toBuilder = false}) => '($object as $nullableName)';
-    if (name == 'JsonObject') {
-      return 'JsonObject($object)${nullable ? '?' : ''}';
-    }
-
-    return '($object as $nullableName)';
-  }
 
   @override
   String decode(final String object) {

packages/nextcloud/lib/src/nextcloud.openapi.dart

@@ -463,7 +463,7 @@ class NextcloudCoreClient {
       body,
     );
     if (response.statusCode == 200) {
-      return JsonObject(JsonObject(utf8.decode(response.body)));
+      return JsonObject(utf8.decode(response.body));
     }
     throw NextcloudApiException.fromResponse(response); // coverage:ignore-line
   }