Undo change accidentally committed to the Config.sh file

dfall_ws/src/dfall_pkg/launch/Config.sh

 # TO RUN THE SYSTEM FULLY ON THE LOCAL COMPUTER:
-export ROS_MASTER_URI=http://localhost:11311
+#export ROS_MASTER_URI=http://localhost:11311
 # TO RUN THE SYSTEM ON A DEFAULT CONFIGURATION OF THE NETWROK:
-#export ROS_MASTER_URI=http://teacher:11311
+export ROS_MASTER_URI=http://teacher:11311
 # OTHER NECESSARY ENVIRONMENT VARIABLES:
 export ROS_IP=$(hostname -I | awk '{print $1;}')
 export DFALL_DEFAULT_AGENT_ID=$(cat /etc/dfall_default_agent_id)