fixup! Alternative time zone lookup using strftime, to complement Rails mapping

Author: epologee

lib/ice_cube/parsers/ical_parser.rb

@@ -100,7 +100,7 @@ def self.find_zone(tzid)
       begin
         Time.find_zone!(zone) if zone.present?
       rescue ArgumentError
-        (rails_zone, tzinfo_id) = ActiveSupport::TimeZone::MAPPING.find do |(k, _)|
+        (rails_zone, _tzinfo_id) = ActiveSupport::TimeZone::MAPPING.find do |(k, _)|
           candidate = Time.find_zone!(k)
           candidate.now.strftime("%Z") == zone
         end