remove unused sh file

guiTools/spawn_drones.sh

@@ -1,32 +0,0 @@
-#!/bin/bash
-set -e #PR #6
-source /opt/ros/$ROS_DISTRO/setup.bash
-
-if [[ -z $SIM_DRONE_COUNT ]]
-then
-  echo "SIM_DRONE_COUNT environment variable is not set."
-  exit 1
-fi
-
-gz sim -v -r $WORLD_FILE_NAME &
-while true
-do
-  topics=$(gz topic -l)
-  if [[ $topics == *"/world/$WORLD_NAME"* ]]
-  then
-    break
-  fi
-  sleep 1
-done
-
-cd /ardupilot_gazebo/models/$DRONE_MODEL
-for (( j=0; j<$SIM_DRONE_COUNT; j++ ));
-do
-    xacro -v gstreamer_udp_port:=$(($GSTREAMER_UDP_PORT + ($j * 10))) fdm_port_in:=$(($FDM_PORT_IN + ($j * 10))) model.xacro.sdf -o model.sdf
-    #! string is better than using -file option. File is not up to date in the next iteration.
-    value=$(</ardupilot_gazebo/models/$DRONE_MODEL/model.sdf)
-    gz_drone_name=spiri-$(($j + 1))
-    #? Maybe read from text file for formation of drones? x y z r p y
-    ros2 run ros_gz_sim create -world $WORLD_NAME -string "$value" -name $gz_drone_name -x $j  -y 0 -z 0.195
-done
-exec "$@"