remove extra changelog entry for image

Author: mmarchetti

CHANGELOG.md

@@ -26,9 +26,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - You can now deploy static content such as html and its associated assets with 
   `rsconnect deploy html`.
 
-- An optional `image` parameter has been added to the applicable functions to support
-  target content image. This parameter defaults to `None` if not provided.
-
 ## [1.7.1] - 2022-02-15
 
 ### Added