delete code for re embedding

langchat-server/src/main/java/cn/tycoding/langchat/server/endpoint/EmbeddingEndpoint.java

@@ -116,7 +116,6 @@ public class EmbeddingEndpoint {
         if (EmbedConst.ORIGIN_TYPE_UPLOAD.equals(docs.getType())) {
             // clear before re-embed
             embeddingService.clearDocSlices(docsId);
-            embeddingService.embedDocsSlice(docs, docs.getUrl());
             TaskManager.submitTask(userId,
                     Executors.callable(() -> embeddingService.embedDocsSlice(docs, docs.getUrl())));
         }