remove dependency on dbt-core legacy logger (#1233)

* use dynamic schema in test_grant_access_to.py
* revert setup
* remove broken import

(cherry picked from commit d148cc3)

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):