remove unused imports

Author: dizcology

bigquery-reservation/snippets/conftest.py

@@ -12,9 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import datetime
 import os
-import time
 
 from google.cloud.bigquery_reservation_v1.services import reservation_service
 from google.cloud.bigquery_reservation_v1.types import reservation as reservation_types