removed debug output

Former-commit-id: 915be7778b

src/storage/dd/cudd/InternalCuddAdd.cpp

@@ -230,7 +230,6 @@ namespace storm {
             if (numberOfDdVariables == 0) {
                 return 0;
             }
-            std::cout << "num dd vars: " << numberOfDdVariables << std::endl;
             return static_cast<uint_fast64_t>(this->getCuddAdd().CountMinterm(static_cast<int>(numberOfDdVariables)));
         }