Remove get local from request.args

args parameters are merged in form in pre_request, so
this patch removes that useless operation.

searx/webapp.py

@@ -157,10 +157,6 @@ def get_locale():
     if request.preferences.get_value('locale') != '':
         locale = request.preferences.get_value('locale')
 
-    if 'locale' in request.args\
-       and request.args['locale'] in settings['locales']:
-        locale = request.args['locale']
-
     if 'locale' in request.form\
        and request.form['locale'] in settings['locales']:
         locale = request.form['locale']