How to delete a hash entry

[Tomasi, Chuck]

I've got hash and I want to completely remove one or more entries from the
list.  I tried undef, but that removes the value and not the key.

%list = (
        first   => 1,
        second => 2,
        third => 3
)

How can I remove $list{second} completely so the following loop only reports
first and third?

foreach $k (keys %list) {
        print "$k=$list{$k}\n";
}

Thanks

--Chuck

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