fix number of arguments to run_uvsim test

Author: mkolopanis

pyuvsim/tests/test_uvsim.py

@@ -930,4 +930,4 @@ def test_backend_error_uvdata_uvsim():
 def test_backend_error_run_uvsim():
     pytest.importorskip('mpi4py')
     with pytest.raises(ValueError, match="The backend keyword must be one of "):
-        pyuvsim.run_uvsim(None, False, False, False, backend="Test")
+        pyuvsim.run_uvsim(None, False, False, backend="Test")