Remove monkey patches of Range#each and Range#step

Reverts rails#11474.

For Range#each, Ruby raises the same error as did the monkey patch for an ActiveSupport::TimeWithZone boundary, there is no behavior change.

For Range#step, Ruby versions < 3.4 raise the same error as did the monkey patch. Since Ruby >= 3.4, Range#step uses the #+ method on the boundary to generate range elements, which ActiveSupport::TimeWithZone implements. PR for more context: ruby/ruby#7444

Author: lovro-bikic

activesupport/lib/active_support/core_ext/range.rb

@@ -3,4 +3,3 @@
 require "active_support/core_ext/range/conversions"
 require "active_support/core_ext/range/compare_range"
 require "active_support/core_ext/range/overlap"
-require "active_support/core_ext/range/each"

activesupport/lib/active_support/core_ext/range/each.rb

@@ -253,10 +253,18 @@ def test_each_on_time_with_zone
     end
   end
 
-  def test_step_on_time_with_zone
-    twz = ActiveSupport::TimeWithZone.new(nil, ActiveSupport::TimeZone["Eastern Time (US & Canada)"], Time.utc(2006, 11, 28, 10, 30))
-    assert_raises TypeError do
-      ((twz - 1.hour)..twz).step(1) { }
+  if RUBY_VERSION < "3.4"
+    def test_step_on_time_with_zone
+      twz = ActiveSupport::TimeWithZone.new(nil, ActiveSupport::TimeZone["Eastern Time (US & Canada)"], Time.utc(2006, 11, 28, 10, 30))
+      assert_raises TypeError do
+        ((twz - 1.hour)..twz).step(1) { }
+      end
+    end
+  else
+    def test_step_on_time_with_zone
+      twz = ActiveSupport::TimeWithZone.new(nil, ActiveSupport::TimeZone["Eastern Time (US & Canada)"], Time.utc(2006, 11, 28, 10, 30))
+
+      assert_equal [twz, twz + 15.minutes, twz + 30.minutes], (twz..).step(15.minutes).first(3)
     end
   end