simplify type check, remove redundant test

Author: rajumsys

sparkpost/transmissions.py

@@ -139,7 +139,7 @@ def _parse_address(self, address):
 
     def _extract_recipients(self, recipients):
 
-        if not (isinstance(recipients, list) or isinstance(recipients, dict)):
+        if not (isinstance(recipients, (list, dict))):
             raise SparkPostException('recipients must be a list or dict')
 
         formatted_recipients = []

test/test_transmissions.py

@@ -28,13 +28,6 @@ def test_translate_keys_with_recips():
                                      {'key': 'value'},
                                      {'address': {'email': 'foobar'}}]
 
-    results = t._translate_keys(
-        recipients=[{'address': {'name': 'foo', 'email': 'bar'}}]
-    )
-    assert results['recipients'] == [
-            {'address': {'name': 'foo', 'email': 'bar'}}
-    ]
-
 
 def test_exceptions_for_recipients():
     t = Transmissions('uri', 'key')