modify docs

Author: firingLi

README.md

@@ -3,10 +3,6 @@
 This is a standalone backend plugin for use with [Hashicorp Vault](https://www.github.com/hashicorp/vault). This plugin
 allows authentication to Vault using Cloud Access Management (CAM).
 
-**Please note**: We take Vault's security and our users' trust very seriously. If you believe you have found a security
-issue in Vault, _please responsibly disclose_ by contacting us
-at [security@hashicorp.com](mailto:security@hashicorp.com).
-
 ## Quick Links
 
 - [Vault Website](https://www.vaultproject.io)