Remove deprecated SafeBuffer#clone_empty

Author: rafaelfranca

activesupport/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   Remove deprecated `SafeBuffer#clone_empty`.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated `#to_default_s` from `Array`, `Date`, `DateTime` and `Time`.
 
     *Rafael Mendonça França*

activesupport/lib/active_support/core_ext/string/output_safety.rb

@@ -77,13 +77,6 @@ def initialize_copy(other)
       @html_safe = other.html_safe?
     end
 
-    def clone_empty # :nodoc:
-      ActiveSupport.deprecator.warn <<~EOM
-        ActiveSupport::SafeBuffer#clone_empty is deprecated and will be removed in Rails 7.2.
-      EOM
-      self[0, 0]
-    end
-
     def concat(value)
       unless value.nil?
         super(implicit_html_escape_interpolated_argument(value))

activesupport/test/safe_buffer_test.rb

@@ -195,21 +195,6 @@ def test_titleize
     assert_kind_of NilClass, @buffer.slice("chipchop")
   end
 
-  test "clone_empty returns an empty buffer" do
-    assert_deprecated(ActiveSupport.deprecator) do
-      assert_equal "", ActiveSupport::SafeBuffer.new("foo").clone_empty
-    end
-  end
-
-  test "clone_empty keeps the original dirtiness" do
-    assert_deprecated(ActiveSupport.deprecator) do
-      assert_predicate @buffer.clone_empty, :html_safe?
-    end
-    assert_deprecated(ActiveSupport.deprecator) do
-      assert_not_predicate @buffer.gsub!("", "").clone_empty, :html_safe?
-    end
-  end
-
   test "Should be safe when sliced if original value was safe" do
     new_buffer = @buffer[0, 0]
     assert_not_nil new_buffer

guides/source/7_2_release_notes.md

@@ -207,6 +207,8 @@ Please refer to the [Changelog][active-support] for detailed changes.
 
 ### Removals
 
+*   Remove deprecated `SafeBuffer#clone_empty`.
+
 *   Remove deprecated `#to_default_s` from `Array`, `Date`, `DateTime` and `Time`.
 
 *   Remove deprecated `:pool_size` and `:pool_timeout` options for the cache storage.