X++:
void deleteFirstRows()
{
this.deleteRange('A12:Z12');
/*
this.deleteRange('A12');
this.deleteRange('B12');
this.deleteRange('C12');
this.deleteRange('D12');
this.deleteRange('E12');
this.deleteRange('F12');
this.deleteRange('G12');
this.deleteRange('H12');
this.deleteRange('I12');
this.deleteRange('J12');
this.deleteRange('K12');
this.deleteRange('L12');
this.deleteRange('M12');
this.deleteRange('N12');
this.deleteRange('O12');
this.deleteRange('P12');
this.deleteRange('Q12');
this.deleteRange('R12');
this.deleteRange('S12');
this.deleteRange('T12');
this.deleteRange('U12');
this.deleteRange('V12');
this.deleteRange('W12');
this.deleteRange('X12');
this.deleteRange('Y12');
this.deleteRange('Z12');
*/
}