Address PR comments

Signed-off-by: Sachin Kale <kalsac@amazon.com>

server/src/main/java/org/opensearch/node/remotestore/RemoteStorePinnedTimestampService.java

@@ -184,7 +184,7 @@ public void onResponse(List<BlobMetadata> blobMetadata) {
                             oldFilesToBeDeleted
                         );
                     } catch (IOException e) {
-                        throw new RuntimeException(e);
+                        logger.error("Exception while deleting stale pinned timestamps", e);
                     }
                 }
             }