Bug 14696: useless use of String::Random in catalogue/search.pl

Bug 14696: useless use of String::Random in catalogue/search.pl

Bug 10404 adds the use of String::Random to catalogue/search.pl but bug
11369 removes it without removing the import line.

Test plan:
  git grep String::Random catalogue/search.pl
should not return anything

Signed-off-by: Joonas Kylmälä <j.kylmala@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@unc.edu.ar>
(cherry picked from commit 90285259e898f4734684edf10a64c252a180fdf6)
Signed-off-by: Liz Rea <wizzyrea@gmail.com>