chore: clean up changelog for v2.1.6 release

Signed-off-by: BRIAN GLEESON <Brian.Gleeson@ie.ibm.com>

Author: briangleeson

CHANGELOG.md

@@ -6,34 +6,6 @@
 * fix release ([#75](https://github.com/IBM/continuous-delivery-node-sdk/issues/75)) ([a4c2b66](https://github.com/IBM/continuous-delivery-node-sdk/commit/a4c2b665297a3410186da254ad0bfe1e5ff2aee7))
 * upgrade to ibm-cloud-sdk-core@^5.4.10 ([#74](https://github.com/IBM/continuous-delivery-node-sdk/issues/74)) ([9c042cc](https://github.com/IBM/continuous-delivery-node-sdk/commit/9c042ccde9cd2c558034643fa97b42f19d86692e))
 
-## [2.1.7](https://github.com/IBM/continuous-delivery-node-sdk/compare/v2.1.6...v2.1.7) (2026-04-09)
-
-
-### Bug Fixes
-
-* fix release ([#75](https://github.com/IBM/continuous-delivery-node-sdk/issues/75)) ([a4c2b66](https://github.com/IBM/continuous-delivery-node-sdk/commit/a4c2b665297a3410186da254ad0bfe1e5ff2aee7))
-
-## [2.1.6](https://github.com/IBM/continuous-delivery-node-sdk/compare/v2.1.5...v2.1.6) (2026-04-09)
-
-
-### Bug Fixes
-
-* upgrade to ibm-cloud-sdk-core@^5.4.10 ([#74](https://github.com/IBM/continuous-delivery-node-sdk/issues/74)) ([9c042cc](https://github.com/IBM/continuous-delivery-node-sdk/commit/9c042ccde9cd2c558034643fa97b42f19d86692e))
-
-## [2.1.6](https://github.com/IBM/continuous-delivery-node-sdk/compare/v2.1.5...v2.1.6) (2026-04-09)
-
-
-### Bug Fixes
-
-* upgrade to ibm-cloud-sdk-core@^5.4.10 ([#74](https://github.com/IBM/continuous-delivery-node-sdk/issues/74)) ([9c042cc](https://github.com/IBM/continuous-delivery-node-sdk/commit/9c042ccde9cd2c558034643fa97b42f19d86692e))
-
-## [2.1.6](https://github.com/IBM/continuous-delivery-node-sdk/compare/v2.1.5...v2.1.6) (2026-04-09)
-
-
-### Bug Fixes
-
-* upgrade to ibm-cloud-sdk-core@^5.4.10 ([#74](https://github.com/IBM/continuous-delivery-node-sdk/issues/74)) ([9c042cc](https://github.com/IBM/continuous-delivery-node-sdk/commit/9c042ccde9cd2c558034643fa97b42f19d86692e))
-
 ## [2.1.5](https://github.com/IBM/continuous-delivery-node-sdk/compare/v2.1.4...v2.1.5) (2026-03-02)