remove old PartitioningStrategy

exo/topology/partitioning_strategy.py

@@ -12,10 +12,6 @@ class Partition:
     start: float
     end: float
 
-class PartitioningStrategy(ABC):
-    def node_id(self) -> str:
-        pass
-
 class PartitioningStrategy(ABC):
     @abstractmethod
     def partition(self, topology: Topology) -> List[Partition]: