Remove duplicates in changelog (#1068)

## Description

It appears there was an accident resolving conflicts in the changelog,
which resulted in 1.4.2 and 1.4.1 (with the content for 1.4.3) being
listed twice.

## Related Issue(s)

N/A

## Breaking Change?

No

## Checklist

- [ ] I have made corresponding changes to the documentation (if
required)
- [ ] I have added tests that prove my fix is effective or that my
feature works

CHANGELOG.rst

@@ -50,48 +50,6 @@ Docs
 * Fix docs so it does not reference non-existing ``get_dbt_dataset`` by @tatiana in #1034
 
 
-v1.4.2 (2024-06-06)
--------------------
-
-Bug fixes
-
-* Fix the invocation mode for ``ExecutionMode.VIRTUALENV`` by @marco9663 in #1023
-* Fix Cosmos ``enable_cache`` setting by @tatiana in #1025
-* Make ``GoogleCloudServiceAccountDictProfileMapping`` dataset profile arg optional by @oliverrmaa and @pankajastro in #839 and #1017
-* Athena profile mapping set ``aws_session_token`` in profile only if it exists by @pankajastro in #1022
-
-Others
-
-* Update dbt and Airflow conflicts matrix by @tatiana in #1026
-* Enable Python 3.12 unittest by @pankajastro in #1018
-* Improve error logging in ``DbtLocalBaseOperator`` by @davidsteinar in #1004
-* Add GitHub issue templates for bug reports and feature request by @pankajkoti in #1009
-* Add more fields in bug template to reduce turnaround in issue triaging by @pankajkoti in #1027
-* Fix ``dev/Dockerfile`` + Add ``uv pip install`` for faster build time by @dwreeves in #997
-* Drop support for Airflow 2.3 by @pankajkoti in #994
-* Update Astro Runtime image by @RNHTTR in #988 and #989
-* Enable ruff F linting by @pankajastro in #985
-* Move Cosmos Airflow configuration to settings.py by @pankajastro in #975
-* Fix CI Issues by @tatiana in #1005
-* Pre-commit hook updates in #1000, #1019
-
-
-1.4.1 (2024-05-17)
-------------------
-
-Bug fixes
-
-* Bring back ``dataset`` as a required field for BigQuery profile by @pankajkoti in #1033
-
-Enhancements
-
-* Only run ``dbt deps`` when there are dependencies by @tatiana in #1030
-
-Docs
-
-* Fix docs so it does not reference non-existing ``get_dbt_dataset`` by @tatiana in #1034
-
-
 1.4.2 (2024-06-06)
 ------------------