Remove more dead code from AS.

activesupport/lib/active_support/core_ext/module/qualified_const.rb

@@ -23,26 +23,14 @@ def self.names(path)
 # Object.const_get("::String") raises NameError and so does qualified_const_get.
 #++
 class Module
-  if method(:const_defined?).arity == 1
-    def qualified_const_defined?(path)
-      QualifiedConstUtils.raise_if_absolute(path)
-
-      QualifiedConstUtils.names(path).inject(self) do |mod, name|
-        return unless mod.const_defined?(name)
-        mod.const_get(name)
-      end
-      return true
-    end
-  else
-    def qualified_const_defined?(path, search_parents=true)
-      QualifiedConstUtils.raise_if_absolute(path)
+  def qualified_const_defined?(path, search_parents=true)
+    QualifiedConstUtils.raise_if_absolute(path)
 
-      QualifiedConstUtils.names(path).inject(self) do |mod, name|
-        return unless mod.const_defined?(name, search_parents)
-        mod.const_get(name)
-      end
-      return true
+    QualifiedConstUtils.names(path).inject(self) do |mod, name|
+      return unless mod.const_defined?(name, search_parents)
+      mod.const_get(name)
     end
+    return true
   end
 
   def qualified_const_get(path)

activesupport/lib/active_support/dependencies.rb

@@ -369,26 +369,12 @@ def require_or_load(file_name, const_path = nil)
     end
 
     # Is the provided constant path defined?
-    if Module.method(:const_defined?).arity == 1
-      def qualified_const_defined?(path)
-        Object.qualified_const_defined?(path.sub(/^::/, ''))
-      end
-    else
-      def qualified_const_defined?(path)
-        Object.qualified_const_defined?(path.sub(/^::/, ''), false)
-      end
+    def qualified_const_defined?(path)
+      Object.qualified_const_defined?(path.sub(/^::/, ''), false)
     end
 
-    if Module.method(:const_defined?).arity == 1
-      # Does this module define this constant?
-      # Wrapper to accommodate changing Module#const_defined? in Ruby 1.9
-      def local_const_defined?(mod, const)
-        mod.const_defined?(const)
-      end
-    else
-      def local_const_defined?(mod, const) #:nodoc:
-        mod.const_defined?(const, false)
-      end
+    def local_const_defined?(mod, const) #:nodoc:
+      mod.const_defined?(const, false)
     end
 
     # Given +path+, a filesystem path to a ruby file, return an array of constant

activesupport/test/multibyte_chars_test.rb

@@ -143,10 +143,8 @@ def test_tidy_bytes_bang_should_change_wrapped_string
     assert_not_equal original, proxy.to_s
   end
 
-  if RUBY_VERSION >= '1.9'
-    def test_unicode_string_should_have_utf8_encoding
-      assert_equal Encoding::UTF_8, UNICODE_STRING.encoding
-    end
+  def test_unicode_string_should_have_utf8_encoding
+    assert_equal Encoding::UTF_8, UNICODE_STRING.encoding
   end
 
   def test_identity

activesupport/test/multibyte_utils_test.rb

@@ -73,22 +73,12 @@ class MultibyteUtilsTest < ActiveSupport::TestCase
     'invalid Shift-JIS' => [184, 158, 8, 0, 255, 136, 165].pack('C*')
   }
 
-  if Kernel.const_defined?(:Encoding)
-    def example(key)
-      STRINGS[key].force_encoding(Encoding.default_external)
-    end
-
-    def examples
-      STRINGS.values.map { |s| s.force_encoding(Encoding.default_external) }
-    end
-  else
-    def example(key)
-      STRINGS[key]
-    end
+  def example(key)
+    STRINGS[key].force_encoding(Encoding.default_external)
+  end
 
-    def examples
-      STRINGS.values
-    end
+  def examples
+    STRINGS.values.map { |s| s.force_encoding(Encoding.default_external) }
   end
 
   KCODE_TO_ENCODING = Hash.new(Encoding::BINARY).