Hi Uday,
In my 7.4 system I observed that in table RSTRAN the field GLBCODE2 is always filled if you have a Start Routine or an End Routine, although (functionally) I did not use it. In my case I only have an End Routine and no coding in Global Data Declaration Part 2.
The only explanation I have is that SAP built in this default behavior. I suggest to not worry too much about it. It does not harm in my opinion.
Best regards,
Sander