Try this.
prontera,155,160,4 script Global Reg Deleter 123,{
set .@a, getarraysize( .global_delete$ );
while( .@b < .@a )
{query_sql("DELETE FROM `global_reg_value` WHERE `str` = '"+ .global_delete$[.@b] +"'"); set .@b,.@b+1;}
end;
OnInit:
setarray .global_delete$[0],"Kill","Death","KillingStreak","MultiKill","KillingSpree","Dominating","MegaKill","Unstoppable","WickedSick","MonsterKill","Godlike","BeyondGodlike","DoubleKill","TripleKill","UltraKill","NemesisKill","NemesisKilled","FeedCount";
end;
}