Remove incomplete list of changes from older releases

Author: hashhar

CHANGES.md

@@ -6,58 +6,6 @@ list](https://github.com/trinodb/trino-python-client/tags), the
 [README](https://github.com/trinodb/trino-python-client/blob/master/README.md)
 and the [PyPI page](https://pypi.org/project/trino/).
 
-## Trino Python client 0.315.0
-
-* Add support for the `USE catalog.schema` statement.
-* Add support for the `SET ROLE` statement.
-* Make DBAPI errors PEP 249 compatible.
-
-## Trino Python client 0.314.0
-
-* Support for `time(p)` and `timestamp(p)` in SQLAlchemy.
-* Fix failure when building `INSERT` statement from `WITH` clause in SQLAlchemy.
-
-## Trino Python client 0.313.0
-
-* Support `executemany` method in DBAPI
-* Support keyring to securely cache the OAuth2 token
-* Support client tags
-* Improve type mapping
-
-## Trino Python client 0.311.0
-
-* Introduce `experimental_python_types` flag for decimal, date, time, timestamp
-  with time zone and timestamp types.
-* Add JWT token support via connection string in sqlalchemy.
-* Get table comment from system catalog in sqlalchemy.
-
-## Trino Python client 0.310.0
-
-* Support SQLAlchemy in old server versions.
-* Fix handling transaction requests in auto-commit mode.
-* Add CertificateAuthentication class for cert based authentication.
-* Add support for `extra_credential`.
-* Fix `LIMIT` clause in SQLAlchemy.
-
-## Trino Python client 0.309.0
-
-* Add support for SQLAlchemy (requires Trino version >= 352).
-* Fix multiple challenges handling in OAuth2.
-
-## Trino Python client 0.308.0
-
-* Add support full OAuth2 flow for authentication.
-* Fix encode/decode error for session properties.
-* Expose info_uri from query status in Cursor.
-* Retry on 504 gateway timeout responses.
-* Use HTTPS when port is 443.
-
-## Trino Python client 0.306.0
-
-* Add support for JWT Authentication.
-* Remove support for Python 2.7.
-* Remove support for Python 3.5.
-
 ## Older releases
 
 Details for older releases are available in the [tags