sql/parser: Remove builtin log/log10 function repetition
sql/parser: Remove builtin log/log10 function repetition

Per @tamird's suggestion.

bg451/cockroach,il9ue/cockroach,glycerine/cockroach,cuongdo/cockroach,maxlang/cockroach,il9ue/cockroach,vivekmenezes/cockroach,paperstreet/cockroach,bg451/cockroach,maxlang/cockroach,sunya123/cockroach,glycerine/cockroach,il9ue/cockroach,arjun4084346/cockroach,cuongdo/cockroach,paperstreet/cockroach,cockroachdb/cockroach,glycerine/cockroach,veteranlu/cockroach,maxlang/cockroach,sunya123/cockroach,arjun4084346/cockroach,nieyy/cockroach,bg451/cockroach,maxlang/cockroach,cockroachdb/cockroach,bg451/cockroach,vivekmenezes/cockroach,paperstreet/cockroach,vivekmenezes/cockroach,sunya123/cockroach,arjun4084346/cockroach,cuongdo/cockroach,cockroachdb/cockroach,veteranlu/cockroach,petermattis/cockroach,nieyy/cockroach,vaibhavarora/cockroach,paperstreet/cockroach,petermattis/cockroach,maxlang/cockroach,cuongdo/cockroach,maxlang/cockroach,vaibhavarora/cockroach,vivekmenezes/cockroach,bg451/cockroach,petermattis/cockroach,glycerine/cockroach,il9ue/cockroach,vaibhavarora/cockroach,vaibhavarora/cockroach,maxlang/cockroach,vivekmenezes/cockroach,il9ue/cockroach,veteranlu/cockroach,paperstreet/cockroach,cuongdo/cockroach,paperstreet/cockroach,paperstreet/cockroach,il9ue/cockroach,petermattis/cockroach,nieyy/cockroach,sunya123/cockroach,cuongdo/cockroach,veteranlu/cockroach,cuongdo/cockroach,vaibhavarora/cockroach,bg451/cockroach,vaibhavarora/cockroach,cuongdo/cockroach,nieyy/cockroach,petermattis/cockroach,cockroachdb/cockroach,cockroachdb/cockroach,sunya123/cockroach,sunya123/cockroach,nieyy/cockroach,glycerine/cockroach,veteranlu/cockroach,bg451/cockroach,glycerine/cockroach,veteranlu/cockroach,il9ue/cockroach,glycerine/cockroach,arjun4084346/cockroach,cockroachdb/cockroach,arjun4084346/cockroach,cockroachdb/cockroach,arjun4084346/cockroach,paperstreet/cockroach,petermattis/cockroach,nieyy/cockroach,veteranlu/cockroach,il9ue/cockroach,glycerine/cockroach,vivekmenezes/cockroach,arjun4084346/cockroach,nieyy/cockroach,petermattis/cockroach,arjun4084346/cockroach,petermattis/cockroach,vivekmenezes/cockroach,sunya123/cockroach,vaibhavarora/cockroach,sunya123/cockroach,vaibhavarora/cockroach,nieyy/cockroach,cockroachdb/cockroach,maxlang/cockroach,vivekmenezes/cockroach,veteranlu/cockroach