test: Remove useless overwrite

Author: MarcoFalke

test/functional/feature_anchors.py

@@ -25,9 +25,6 @@ def set_test_params(self):
         self.num_nodes = 1
         self.disable_autoconnect = False
 
-    def setup_network(self):
-        self.setup_nodes()
-
     def run_test(self):
         node_anchors_path = os.path.join(
             self.nodes[0].datadir, "regtest", "anchors.dat"