mapper: remove unused ifaceAllowList

This feature was left unimplemented in the switch from the python to the
c++ mapper and noone seems to have noticed.  Drop the remaining
references to it.

Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Change-Id: I60dab879503cdf2c7abd152d6794570f15ee431a
diff --git a/src/main.cpp b/src/main.cpp
index 81bba2b..12969b1 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -660,11 +660,6 @@
     splitArgs(options["service-namespaces"], serviceAllowList);
     splitArgs(options["service-blacklists"], serviceDenyList);
 
-    // TODO(Ed) Remove this once all service files are updated to not use this.
-    // For now, simply squash the input, and ignore it.
-    boost::container::flat_set<std::string> ifaceAllowlist;
-    splitArgs(options["interface-namespaces"], ifaceAllowlist);
-
     sdbusplus::asio::object_server server(systemBus);
 
     // Construct a signal set registered for process termination.