Update runner.py

failfast is an option that already is inside of the standard test.py -- throws an error as its duplicated

Author: kingbuzzman

pytest_django/runner.py

@@ -19,11 +19,6 @@ def __init__(
 
     @classmethod
     def add_arguments(cls, parser: ArgumentParser) -> None:
-        parser.add_argument(
-            "--failfast",
-            action="store_true",
-            help="Stops the test suite after the first failure.",
-        )
         parser.add_argument(
             "--keepdb", action="store_true", help="Preserves the test DB between runs."
         )