remove --nan-to-num CLI parameter (#548)

* remove --nan-to-num CLI parameter

* factor tests better

* lint - remove unused variables

server/test/test_nan_rest.py

@@ -49,48 +49,3 @@ class WithNaNs(unittest.TestCase):
             url = f"{URL_BASE}{endpoint}"
             result = self.session.get(url)
             self.assertEqual(result.status_code, HTTPStatus.INTERNAL_SERVER_ERROR)
-
-
-class WithoutNaNs(unittest.TestCase):
-    """Test Case for endpoints"""
-
-    @classmethod
-    def setUpClass(cls):
-        cls.ps = Popen(
-            [
-                "cellxgene",
-                "launch",
-                "server/test/test_datasets/nan.h5ad",
-                "--nan-to-num",
-                "--debug",
-            ]
-        )
-        session = requests.Session()
-        for i in range(90):
-            try:
-                session.get(f"{URL_BASE}schema")
-            except requests.exceptions.ConnectionError:
-                time.sleep(1)
-
-    @classmethod
-    def tearDownClass(cls):
-        try:
-            cls.ps.terminate()
-        except ProcessLookupError:
-            pass
-
-    def setUp(self):
-        self.session = requests.Session()
-
-    def test_initialize(self):
-        endpoint = "schema"
-        url = f"{URL_BASE}{endpoint}"
-        result = self.session.get(url)
-        self.assertEqual(result.status_code, HTTPStatus.OK)
-
-    def test_errors(self):
-        endpoints = ["annotations/obs", "annotations/var", "data/obs", "data/var"]
-        for endpoint in endpoints:
-            url = f"{URL_BASE}{endpoint}"
-            result = self.session.get(url)
-            self.assertEqual(result.status_code, HTTPStatus.OK)