Remove the redundant condition inclusion to avoid confusion (#4254)

Summary:
The pair of ROCKSDB_LITE condition inclusion is redundant, it is already inside the #ifndef ROCKSDB_LITE. Remove them to void confusion.

Tested by make asan_check.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4254

Differential Revision: D9281652

Pulled By: zhichao-cao

fbshipit-source-id: 06bf7641ede71391f21f6a3fe37fbd13f0e2a43a

db/db_impl.cc

@@ -3091,7 +3091,6 @@ Status DBImpl::VerifyChecksum() {
 
 void DBImpl::NotifyOnExternalFileIngested(
     ColumnFamilyData* cfd, const ExternalSstFileIngestionJob& ingestion_job) {
-#ifndef ROCKSDB_LITE
   if (immutable_db_options_.listeners.empty()) {
     return;
   }
@@ -3107,8 +3106,6 @@ void DBImpl::NotifyOnExternalFileIngested(
       listener->OnExternalFileIngested(this, info);
     }
   }
-
-#endif
 }
 
 void DBImpl::WaitForIngestFile() {