Revert "Merge pull request #8899 from demarches-simplifiees/8738-validate-adresse-electronique"

This reverts commit d3eda28f35, reversing
changes made to 6394996e7f.

app/models/champs/email_champ.rb

@@ -21,11 +21,4 @@
 #  type_de_champ_id               :integer
 #
 class Champs::EmailChamp < Champs::TextChamp
-  validates :value,
-    format: {
-      with: Devise.email_regexp,
-      message: I18n.t('invalid', scope: 'activerecord.errors.models.email_champ.attributes.value')
-    },
-    allow_nil: true,
-    if: -> { validation_context != :brouillon }
 end