SW-612: Correct a bug introduced by 2to3 conversion, version #2 from JD

CEP/Pipeline/framework/lofarpipe/support/parset.py

@@ -48,7 +48,7 @@ class Parset(parameterset):
 
     def subtractSubset(self, baseKey):
         super(Parset, self).subtractSubset(baseKey)
-        self.keys = [False if key[:len(baseKey)] == baseKey else True for key in self.keys]
+        self.keys = [key for key in self.keys if (False if key[:len(baseKey)] == baseKey else True)]
 
     #def makeSubset(self, baseKey, prefix=None):
         #newps = Parset()