Removes pointless failing unit test

Per comment in merge request
#13 (comment)

Author: illusional

test/test_unit_workflow.py

@@ -85,34 +85,6 @@ def test_generates_workflow_int_inputs(self):
         generated = self.capture_tempfile(w.export)
         self.assertEqual(expected, generated)
 
-    def test_generates_workflow_optional_int_inputs(self):
-        w = cwlgen.Workflow()
-        # Use the same tool as the previous similar int_inputs
-        tool = cwlgen.parse_cwl("test/int_tool.cwl")
-
-        i = cwlgen.workflow.InputParameter('INTEGER', param_type='int?')
-        o1 = w.add('step', tool, {"INTEGER": i})
-        o1['OUTPUT1'].store()
-
-        expected = b"""#!/usr/bin/env cwl-runner
-
-class: Workflow
-cwlVersion: v1.0
-inputs:
-  INTEGER: {id: INTEGER, type: int?}
-outputs:
-  step_OUTPUT1: {id: step_OUTPUT1, outputSource: step/OUTPUT1, type: File}
-steps:
-  step:
-    id: step
-    in: {INTEGER: INTEGER}
-    out: [OUTPUT1]
-    run: test/int_tool.cwl
-"""
-        generated = self.capture_tempfile(w.export)
-        self.assertEqual(expected, generated)
-
-
     def test_add_requirements(self):
         w = cwlgen.Workflow()
         req = cwlgen.InlineJavascriptReq()