If you do not want to generate quota you can control this by table V_503_E there you can group the employees in to a group and according to the grouping you can configure the generation rules for Standard leave.
I.e X grade group 1
Y grade group 2
According to the Group define generation rules.
or else you can go through venkat polineni where you will have the quota balance but employees will not avail the same.
Regards
Venkatesh