Remove IPBasedDistributor.clear() and EmailBasedDistributor.clear().

These were never used anywhere.

lib/bridgedb/Dist.py

@@ -268,9 +268,6 @@ def prepopulateRings(self):
                                       filterBridgesByRules(filters),
                                       populate_from=self.splitter.bridges)
 
-    def clear(self):
-        self.splitter.clear()
-
     def insert(self, bridge):
         """Assign a bridge to this distributor."""
         self.splitter.insert(bridge)
@@ -410,10 +407,6 @@ def __init__(self, key, domainmap, domainrules,
 
         self.setDistributorName('Email')
 
-    def clear(self):
-        self.splitter.clear()
-        #self.ring.clear() # should be take care of by above
-
     def insert(self, bridge):
         """Assign a bridge to this distributor."""
         self.splitter.insert(bridge)