Don't lazy load the tzinfo library

Lazy loading the tzinfo library doesn't really buy us anything because
the gem is installed as a dependency via the gemspec and if a developer
is using Active Support outside of Rails then they can cherry pick which
files to load anyway.

Fixes #13553

activesupport/CHANGELOG.md

@@ -1,3 +1,9 @@
+*   Don't lazy load the `tzinfo` library as it causes problems on Windows.
+
+    Fixes #13553
+
+    *Andrew White*
+
 *   Use `remove_possible_method` instead of `remove_method` to avoid
     a `NameError` to be thrown on FreeBSD with the `Date` object.
 

activesupport/lib/active_support/values/time_zone.rb

@@ -1,3 +1,4 @@
+require 'tzinfo'
 require 'thread_safe'
 require 'active_support/core_ext/object/blank'
 require 'active_support/core_ext/object/try'
@@ -208,8 +209,6 @@ def self.seconds_to_utc_offset(seconds, colon = true)
     # (GMT). Seconds were chosen as the offset unit because that is the unit
     # that Ruby uses to represent time zone offsets (see Time#utc_offset).
     def initialize(name, utc_offset = nil, tzinfo = nil)
-      self.class.send(:require_tzinfo)
-
       @name = name
       @utc_offset = utc_offset
       @tzinfo = tzinfo || TimeZone.find_tzinfo(name)
@@ -389,7 +388,7 @@ def [](arg)
         case arg
           when String
           begin
-            lazy_zones_map[arg] ||= create(arg).tap { |tz| tz.utc_offset }
+            @lazy_zones_map[arg] ||= create(arg).tap { |tz| tz.utc_offset }
           rescue TZInfo::InvalidTimezoneIdentifier
             nil
           end
@@ -406,22 +405,6 @@ def [](arg)
       def us_zones
         @us_zones ||= all.find_all { |z| z.name =~ /US|Arizona|Indiana|Hawaii|Alaska/ }
       end
-
-      protected
-
-        def require_tzinfo
-          require 'tzinfo' unless defined?(::TZInfo)
-        rescue LoadError
-          $stderr.puts "You don't have tzinfo installed in your application. Please add it to your Gemfile and run bundle install"
-          raise
-        end
-
-      private
-
-        def lazy_zones_map
-          require_tzinfo
-          @lazy_zones_map
-        end
     end
 
     private