remove commented-out line

Author: seanstory

server/src/main/java/org/elasticsearch/common/settings/IndexScopedSettings.java

@@ -207,7 +207,6 @@ public final class IndexScopedSettings extends AbstractScopedSettings {
                 IndexSettings.INDEX_MAPPER_SOURCE_MODE_SETTING,
                 IndexSettings.RECOVERY_USE_SYNTHETIC_SOURCE_SETTING,
                 InferenceMetadataFieldsMapper.USE_LEGACY_SEMANTIC_TEXT_FORMAT,
-                // IndexSettings.INDEX_MAPPING_META_LENGTH_LIMIT_SETTING,
 
                 // validate that built-in similarities don't get redefined
                 Setting.groupSetting("index.similarity.", (s) -> {