Changelog: remove duplicate HAR Generator snippet entries from Unreleased (1.7.1)

Author: garrytrinder

CHANGELOG.md

@@ -18,8 +18,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed:
 
 - Snippets: All snippets that reference schemas updated to use `v1.3.0` schema
-- Snippets: Added `devproxy-plugin-har-generator` - HarGeneratorPlugin instance
-- Snippets: Added `devproxy-plugin-har-generator-config` - HarGeneratorPlugin config section
 
 ## [1.6.0] - 2025-10-13