Revert "Merge pull request #21069 from dmitry/feature/validate-multiple-contexts-at-once"

This reverts commit 51dd2588433457960cca592d5b5dac6e0537feac, reversing
changes made to ecb4e4b21b3222b823fa24d4a0598b1f2f63ecfb.

This broke Active Record tests

1 files changed, 0 insertions, 18 deletions

diff --git a/activemodel/CHANGELOG.md b/activemodel/CHANGELOG.md
index 769c0d6291..54fe5794e1 100644
--- a/activemodel/CHANGELOG.md
+++ b/activemodel/CHANGELOG.md
@@ -1,21 +1,3 @@
-*   Validate multiple contexts on `valid?` and `invalid?` at once.
-
-    Example:
-
-        class Person
-          include ActiveModel::Validations
-
-          attr_reader :name, :title
-          validates_presence_of :name, on: :create
-          validates_presence_of :title, on: :update
-        end
-
-        person = Person.new
-        person.valid?([:create, :update])    # => true
-        person.errors.messages               # => {:name=>["can't be blank"], :title=>["can't be blank"]}
-
-    *Dmitry Polushkin*
-
 *   Add case_sensitive option for confirmation validator in models.
 
     *Akshat Sharma*