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/fr1_nsa_quectel.xml

@@ -162,7 +162,6 @@
 		<id>idefix</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">
@@ -172,7 +171,6 @@
 		<id>idefix</id>
 		<iperf_packetloss_threshold>1</iperf_packetloss_threshold>
 		<iperf_bitrate_threshold>95</iperf_bitrate_threshold>
-		<iperf_profile>single-ue</iperf_profile>
 	</testCase>
 
 	<testCase id="080000">