revert code (#2525)

* revert code
Signed-off-by: Nyhmo <yihua.mo@zilliz.com>

* changelog
Signed-off-by: Nyhmo <yihua.mo@zilliz.com>

CHANGELOG.md

@@ -6,7 +6,6 @@ Please mark all change in change log and use the issue from GitHub
 ## Bug
 -   \#2367 Fix inconsistent reading and writing when using mishards
 -   \#2368 Make read node detect delete behavior
--   \#2373 Build index for small segment waste time on waiting background index thread finish
 -   \#2394 Drop collection timeout if too many partitions created on collection
 
 ## Feature

core/src/db/DBImpl.cpp

@@ -2443,7 +2443,7 @@ DBImpl::WaitCollectionIndexRecursively(const std::shared_ptr<server::Context>& c
 
             // check to_index files every 5 seconds or background index thread finished
             repeat++;
-            if ((ret == std::cv_status::no_timeout) || (repeat % WAIT_BUILD_INDEX_INTERVAL == 0)) {
+            if (repeat % WAIT_BUILD_INDEX_INTERVAL == 0) {
                 GetFilesToBuildIndex(collection_id, file_types, files_holder);
                 ++times;
             }