Remove the get_proof RPC.

The client will get an unknown method error message instead.

server/controller.py

@@ -789,11 +789,6 @@ class Controller(ServerBase):
         hashX = self.scripthash_to_hashX(scripthash)
         return await self.unconfirmed_history(hashX)
 
-    async def address_get_proof(self, address):
-        '''Return the UTXO proof of an address.'''
-        hashX = self.address_to_hashX(address)
-        raise RPCError('address.get_proof is not yet implemented')
-
     async def hashX_listunspent(self, hashX):
         '''Return the list of UTXOs of a script hash.
 

server/session.py

@@ -418,7 +418,6 @@ class ElectrumX(SessionBase):
         if ptuple < (1, 1):
             # Methods or semantics unique to 1.0 and earlier protocols
             handlers.update({
-                'blockcahin.address.get_proof': controller.address_get_proof,
                 'blockchain.numblocks.subscribe': self.numblocks_subscribe,
                 'blockchain.utxo.get_address': controller.utxo_get_address,
                 'blockchain.transaction.broadcast':