Remove forgotten cache_clear

pydtn/communities/base.py

@@ -34,7 +34,6 @@ class EpochCommunity(TickProcess):
     def next_epoch(self, now):
         self.community = {}
         edges_to_keep = []
-        self.cache_clear()
 
         for a, b, start in self.graph.edges(data='start'):
             if start > -1:
@@ -53,14 +52,6 @@ class EpochCommunity(TickProcess):
             self.community[node] = frozenset([node])
         return self.community[node]
 
-    def cache_clear(self):
-        self.get_ld.cache_clear()
-        self.get_lp.cache_clear()
-        self.get_ui.cache_clear()
-        self.get_gp.cache_clear()
-        self.get_ncf.cache_clear()
-        self.get_cbc.cache_clear()
-
     def get_ld(self, x):
         ''''''
         g = self.old_graph