Remove "single-ue" profile from config files

- no need to specify "single-ue" profile when running iperf test for 1 UE only
- default profile "balanced" can be used instead, computes BW for 1 UE correctly

ci-scripts/xml_files/container_sa_b200_quectel.xml

@@ -143,7 +143,6 @@
     <svr_id>sabox-nepes</svr_id>
     <iperf_packetloss_threshold>25</iperf_packetloss_threshold>
     <iperf_bitrate_threshold>80</iperf_bitrate_threshold>
-    <iperf_profile>single-ue</iperf_profile>
   </testCase>
 
   <testCase id="070001">
@@ -154,7 +153,6 @@
     <svr_id>sabox-nepes</svr_id>
     <iperf_packetloss_threshold>1</iperf_packetloss_threshold>
     <iperf_bitrate_threshold>95</iperf_bitrate_threshold>
-    <iperf_profile>single-ue</iperf_profile>
   </testCase>
 
   <testCase id="070002">
@@ -163,7 +161,6 @@
     <iperf_args>-t 10 --bidir</iperf_args>
     <id>idefix</id>
     <svr_id>sabox-nepes</svr_id>
-    <iperf_profile>single-ue</iperf_profile>
   </testCase>
 
   <testCase id="070003">