[mod] remove overpass API call

prepare the code the PR #90

searx/webapp.py

@@ -446,8 +446,6 @@ def image_proxify(url):
 
 def get_translations():
     return {
-        # when overpass AJAX request fails (on a map result)
-        'could_not_load': gettext('could not load data'),
         # when there is autocompletion
         'no_item_found': gettext('No item found')
     }