Revert "BUG FIX: correct spatial slot and spin channel are calculated for UHF integrals."
Revert "BUG FIX: correct spatial slot and spin channel are calculated for UHF integrals."

Thanks to previous work to hunt down the bug, I spotted a much simpler fix.

This reverts commit 27d98baa05bf03c7a34ef6990be762c6877efa6a.

hande-qmc/hande,hande-qmc/hande,ruthfranklin/hande,hande-qmc/hande,hande-qmc/hande,hande-qmc/hande