urtps templates: minor cleanup

msg/templates/uorb_microcdr/microRTPS_client.cpp.em

@@ -18,7 +18,7 @@ import gencpp
 from px_generate_uorb_topic_helper import * # this is in Tools/
 from px_generate_uorb_topic_files import MsgScope # this is in Tools/
 
-topic_names = [s.short_name for idx, s in enumerate(spec)]
+topic_names = [s.short_name for s in spec]
 send_topics = [(alias[idx] if alias[idx] else s.short_name) for idx, s in enumerate(spec) if scope[idx] == MsgScope.SEND]
 send_base_types = [s.short_name for idx, s in enumerate(spec) if scope[idx] == MsgScope.SEND]
 recv_topics = [(alias[idx] if alias[idx] else s.short_name) for idx, s in enumerate(spec) if scope[idx] == MsgScope.RECEIVE]

msg/templates/urtps/RtpsTopics.cpp.em

@@ -89,7 +89,7 @@ void RtpsTopics::publish(uint8_t topic_ID, char data_buffer[], size_t len)
 {
     switch (topic_ID)
     {
-@[for idx, topic in enumerate(send_topics)]@
+@[for topic in send_topics]@
         case @(rtps_message_id(ids, topic)): // @(topic)
         {
             @(topic)_ st;