fix: remove wrong entity setting

Author: oesteban

sdcflows/workflows/tests/test_pepolar.py

@@ -160,7 +160,7 @@ def test_pepolar_wf1(bids_layouts, output_path, dataset, workdir):
         rep = pe.Node(FieldmapReportlet(), 'simple_report')
         dsink = pe.Node(DerivativesDataSink(
             base_directory=str(output_path), keep_dtype=True,
-            desc='pepolar', acquisition=None), name='dsink')
+            desc='pepolar'), name='dsink')
         dsink.interface.out_path_base = 'sdcflows'
         dsink.inputs.source_file = epidata[0].path