remove Snyk Vulnerabilities badge

README.md

@@ -19,7 +19,6 @@
 [![codebeat badge](https://codebeat.co/badges/e030a4f6-b126-4475-a938-4723d54ec3a7?style=plastic)](https://codebeat.co/projects/github-com-jinhai-cn-milvus-master)
 [![Codacy Badge](https://api.codacy.com/project/badge/Grade/c4bb2ccfb51b47f99e43bfd1705edd95)](https://app.codacy.com/gh/milvus-io/milvus?utm_source=github.com&utm_medium=referral&utm_content=milvus-io/milvus&utm_campaign=Badge_Grade_Dashboard)
 [![Scrutinizer Quality Score](https://scrutinizer-ci.com/g/milvus-io/milvus/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/milvus-io/milvus/)
-[![Known Vulnerabilities](https://snyk.io/test/github/milvus-io/milvus/badge.svg)](https://snyk.io/test/github/milvus-io/milvus)
 
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat-square)](http://makeapullrequest.com)