Remove duplicate changelog entries

Removed duplicate entries for observability features and bug fixes in the changelog.

Author: dialupdisaster

CHANGELOG.md

@@ -12,13 +12,10 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) and
 ### Features
 
 * **observability:** add debug logging and enhanced metrics ([a1b0a8c](https://github.com/DEVtheOPS/opencode-plugin-otel/commit/a1b0a8cf5263080cf9623355e5161fb88f20e2f1))
-* **observability:** add debug logging and enhanced metrics (v0.3.0) ([46681d8](https://github.com/DEVtheOPS/opencode-plugin-otel/commit/46681d816dbe34049ef9abccc35cc5b023d5fbdd))
-
 
 ### Bug Fixes
 
 * **otel:** use UCUM-compliant unit strings for all metric instruments ([46681d8](https://github.com/DEVtheOPS/opencode-plugin-otel/commit/46681d816dbe34049ef9abccc35cc5b023d5fbdd))
-* **otel:** use UCUM-compliant unit strings for all metric instruments ([040b0b3](https://github.com/DEVtheOPS/opencode-plugin-otel/commit/040b0b3f8b353785e976bbfd59d43250bfb58ef6))
 
 ## [0.2.0] — 2026-03-11