If you can delete from the 4.8 panel, you will want to use the D (drop) line command on the highest node (ie. $#STAT.)
You can also use the backup REXX exec, make an additional copy and modify the code to remove all the 'T=' lines/instructions and then change the OPSVALUE subfunction from a U to a R and delete the 3rd arguement (the 'T') in the OPSVALUE instructions.
The SYSCHK1 dataset is automatically updated every 15 seconds by default, so no additional work for that.