Revert "Guarantee datasource read api is strong consistent read (#1815)…

…" (#2013)

This reverts commit f38ffed.

Signed-off-by: Suraj Singh <surajrider@gmail.com>

datasources/src/main/java/org/opensearch/sql/datasources/storage/OpenSearchDataSourceMetadataStorage.java

@@ -224,9 +224,6 @@ private List<DataSourceMetadata> searchInDataSourcesIndex(QueryBuilder query) {
     searchSourceBuilder.query(query);
     searchSourceBuilder.size(DATASOURCE_QUERY_RESULT_SIZE);
     searchRequest.source(searchSourceBuilder);
-    // strongly consistent reads is requred. more info
-    // https://github.com/opensearch-project/sql/issues/1801.
-    searchRequest.preference("_primary");
     ActionFuture<SearchResponse> searchResponseActionFuture;
     try (ThreadContext.StoredContext ignored =
         client.threadPool().getThreadContext().stashContext()) {