Remove traces of airflow from tests

conftest.py

@@ -4,12 +4,6 @@
 
 
 def pytest_addoption(parser):
-    parser.addoption(
-        "--airflow",
-        action="store_true",
-        dest="airflow",
-        help="including this flag will attempt to ONLY run airflow compatibility tests",
-    )
     parser.addoption(
         "--skip-formatting",
         action="store_true",
@@ -19,28 +13,13 @@ def pytest_addoption(parser):
 
 
 def pytest_configure(config):
-    config.addinivalue_line(
-        "markers", "airflow: mark test to run only when --airflow flag is provided."
-    )
     config.addinivalue_line(
         "markers",
         "formatting: mark test as formatting to skip when --skip-formatting flag is provided.",
     )
 
 
 def pytest_runtest_setup(item):
-    air_mark = item.get_closest_marker("airflow")
-
-    # if a test IS marked as "airflow" and the airflow flag IS NOT set, skip it
-    if air_mark is not None and item.config.getoption("--airflow") is False:
-        pytest.skip(
-            "Airflow tests skipped by default unless --airflow flag provided to pytest."
-        )
-
-    # if a test IS NOT marked as airflow and the airflow flag IS set, skip it
-    elif air_mark is None and item.config.getoption("--airflow") is True:
-        pytest.skip("Non-Airflow tests skipped because --airflow flag was provided.")
-
     formatting_mark = item.get_closest_marker("formatting")
 
     # if a test IS marked as "formatting" and the --skip-formatting flag IS set, skip it