Remove extraneous bullet

Author: richardswinbank

articles/data-factory/data-movement-security-considerations.md

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 - **Store encrypted credentials in an Azure Data Factory managed store**. Data Factory helps protect your data store credentials by encrypting them with certificates managed by Microsoft. These certificates are rotated every two years (which includes certificate renewal and the migration of credentials). For more information about Azure Storage security, see [Azure Storage security overview](../storage/blobs/security-recommendations.md).
 - **Store credentials in Azure Key Vault**. You can also store the data store's credential in [Azure Key Vault](https://azure.microsoft.com/services/key-vault/). Data Factory retrieves the credential during the execution of an activity. For more information, see [Store credential in Azure Key Vault](store-credentials-in-key-vault.md).
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 Centralizing storage of application secrets in Azure Key Vault allows you to control their distribution. Key Vault greatly reduces the chances that secrets may be accidentally leaked. Instead of storing the connection string in the app's code, you can store it securely in Key Vault. Your applications can securely access the information they need by using URIs. These URIs allow the applications to retrieve specific versions of a secret. There's no need to write custom code to protect any of the secret information stored in Key Vault. 
 
 ### Data encryption in transit