Delete test_rfam.py

Accidenntly pushed to wrong branch

tests/test_rfam.py

-import unittest
-from dbxref.retrieve import rfam
-
-
-class TestRfam(unittest.TestCase):
-
-    def test_output(self):
-        documents = rfam.retrieve({"db": "Rfam", "id": "RF03094"}, basics=True, references=True)
-        self.assertTrue(documents)
-
-
-if __name__ == "__main__":
-    unittest.main()