Remove changelog entry

Author: sroda

CHANGELOG.md

@@ -7,9 +7,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
-- Add metrics basic tests to BaseTest class
-  ([#3092](https://github.com/open-telemetry/opentelemetry-python/pull/3092))
-
 ## Version 1.15.0/0.36b0 (2022-12-09)
 
 - Regenerate opentelemetry-proto to be compatible with protobuf 3 and 4