python: style for suricatasc.py

Remove unnecessary return
Better comparison with None

python/suricata/sc/suricatasc.py

@@ -77,7 +77,6 @@ class SuricataCompleter:
             return next(self.generator)
         except StopIteration:
             return None
-        return None
 
 
 class SuricataSC:
@@ -157,7 +156,7 @@ class SuricataSC:
 
     def connect(self):
         try:
-            if self.socket == None:
+            if self.socket is None:
                 self.socket = socket(AF_UNIX)
             self.socket.connect(self.sck_path)
         except error as err: