Autocomplete: Remove duplicate array key in demo

Ref jquerygh-1363
(cherry picked from commit 0fccf94)

Author: bperel

demos/autocomplete/search.php

@@ -368,7 +368,6 @@
 "Glossy Ibis"=>"Plegadis falcinellus",
 "Spanish Imperial Eagle"=>"Aquila adalberti",
 "Lesser Kestrel"=>"Falco naumanni",
-"Houbara Bustard"=>"Chlamydotis undulata",
 "Crab-Plover"=>"Dromas ardeola",
 "Cream-coloured Courser"=>"Cursorius cursor",
 "Collared Pratincole"=>"Glareola pratincola",