constraints update causing test failures in ci/cd (#1308)

* initial pin test to fix constraints issue

* typo

* update

* remove unused import of logger

dev-requirements.txt

@@ -1,6 +1,6 @@
 # install latest changes in dbt-core
 # TODO: how to automate switching from develop to version branches?
-git+https://github.com/dbt-labs/dbt-core.git@1.8.latest#egg=dbt-core&subdirectory=core
+git+https://github.com/dbt-labs/dbt-core.git#egg=dbt-core&subdirectory=core
 git+https://github.com/dbt-labs/dbt-common.git
 git+https://github.com/dbt-labs/dbt-adapters.git
 git+https://github.com/dbt-labs/dbt-adapters.git#subdirectory=dbt-tests-adapter

tests/unit/test_bigquery_adapter.py

@@ -23,7 +23,6 @@
 from dbt.context.query_header import generate_query_header_context
 from dbt.contracts.files import FileHash
 from dbt.contracts.graph.manifest import ManifestStateCheck
-from dbt.logger import GLOBAL_LOGGER as logger  # noqa
 from dbt.context.providers import RuntimeConfigObject, generate_runtime_macro_context
 
 from google.cloud.bigquery import AccessEntry

tests/unit/test_bigquery_connection_manager.py

@@ -9,7 +9,6 @@
 from dbt.adapters.bigquery import BigQueryCredentials
 from dbt.adapters.bigquery import BigQueryRelation
 from dbt.adapters.bigquery.connections import BigQueryConnectionManager
-from dbt.logger import GLOBAL_LOGGER as logger  # noqa
 
 
 class TestBigQueryConnectionManager(unittest.TestCase):