fix:npe

src/main/java/cn/com/poc/knowledge/rest/impl/KnowledgeRestImpl.java

@@ -42,9 +42,6 @@ public class KnowledgeRestImpl implements KnowledgeRest {
     @Resource
     private BizKnowledgeInfoService bizKnowledgeInfoService;
 
-    @Resource
-    private BizKnowledgeDocumentService bizKnowledgeDocumentService;
-
     @Override
     public List<BizKnowledgeDocumentDto> uploadDocument(MultipartFile[] documentFiles) throws Exception {
         Assert.notEmpty(documentFiles);