[DummyPopen] remove redundant parentheses

Author: syntron

OMPython/OMCSession.py

@@ -61,7 +61,7 @@
 logger = logging.getLogger(__name__)
 
 
-class DummyPopen():
+class DummyPopen:
     def __init__(self, pid):
         self.pid = pid
         self.process = psutil.Process(pid)