Fix small logging bug in mp2 and remove some unused vars
Fix small logging bug in mp2 and remove some unused vars

sunqm/pyscf,gkc1000/pyscf,gkc1000/pyscf,sunqm/pyscf,sunqm/pyscf,gkc1000/pyscf,gkc1000/pyscf,sunqm/pyscf,gkc1000/pyscf