scripted-diff: Remove unused 'split' parameter to setup_network

-BEGIN VERIFY SCRIPT-
sed -i -e 's/, split=False//g' $(git grep -l 'def setup_network')
-END VERIFY SCRIPT-

test/functional/rpc_fundrawtransaction.py

@@ -32,7 +32,7 @@ class RawTransactionsTest(BitcoinTestFramework):
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()
 
-    def setup_network(self, split=False):
+    def setup_network(self):
         self.setup_nodes()
 
         connect_nodes_bi(self.nodes, 0, 1)