Remove deprecated support delete errors from ActiveModel::Errors#messages

activemodel/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   Remove deprecated support `delete` errors from `ActiveModel::Errors#messages`.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated support `clear` errors from `ActiveModel::Errors#messages`.
 
     *Rafael Mendonça França*

activemodel/lib/active_model/errors.rb

@@ -511,12 +511,6 @@ module ActiveModel
       __setobj__ prepare_content
     end
 
-    def delete(attribute)
-      ActiveSupport::Deprecation.warn("Calling `delete` to an ActiveModel::Errors messages hash is deprecated. Please call `ActiveModel::Errors#delete` instead.")
-
-      @errors.delete(attribute)
-    end
-
     private
       def prepare_content
         content = @errors.to_hash

activemodel/test/cases/errors_test.rb

@@ -605,15 +605,6 @@ class ErrorsTest < ActiveModel::TestCase
     )
   end
 
-  test "messages delete (deprecated)" do
-    person = Person.new
-    person.validate!
-
-    assert_equal 1, person.errors.count
-    assert_deprecated { person.errors.messages.delete(:name) }
-    assert_empty person.errors
-  end
-
   test "group_by_attribute" do
     person = Person.new
     error = person.errors.add(:name, :invalid, message: "is bad")

guides/source/7_0_release_notes.md

@@ -138,6 +138,8 @@ Please refer to the [Changelog][active-model] for detailed changes.
 
 *   Remove deprecated support `clear` errors from `ActiveModel::Errors#messages`.
 
+*   Remove deprecated support `delete` errors from `ActiveModel::Errors#messages`.
+
 ### Deprecations
 
 ### Notable changes