dba_delete() deletes the entry
specified by key from the
database specified with
handle.
key is the key of the
entry which is deleted.
handle is a database
handle returned by dba_open().
dba_delete() returns TRUE or
FALSE, if the entry is deleted or not deleted,
respectively.
See also: dba_exists(),
dba_fetch(), dba_insert(), and
dba_replace().