removed is_net_node utility to leverage isinstance as other places are consistently

daemon/core/emulator/emudata.py

@@ -1,6 +1,5 @@
 from core.emane.nodes import EmaneNode
 from core.emulator.enumerations import LinkTypes
-from core.nodes.base import CoreNetworkBase
 from core.nodes.ipaddress import Ipv4Prefix, Ipv6Prefix, MacAddress
 from core.nodes.physical import PhysicalNode
 
@@ -14,17 +13,6 @@ class IdGen(object):
         return self.id
 
 
-def is_net_node(node):
-    """
-    Convenience method for testing if a legacy core node is considered a network node.
-
-    :param object node: object to test against
-    :return: True if object is an instance of a network node, False otherwise
-    :rtype: bool
-    """
-    return isinstance(node, CoreNetworkBase)
-
-
 def create_interface(node, network, interface_data):
     """
     Create an interface for a node on a network using provided interface data.