Remove unused E2EE messaging code (#31193)

app/validators/ed25519_key_validator.rb

@@ -1,19 +0,0 @@
-# frozen_string_literal: true
-
-class Ed25519KeyValidator < ActiveModel::EachValidator
-  def validate_each(record, attribute, value)
-    return if value.blank?
-
-    key = Base64.decode64(value)
-
-    record.errors.add(attribute, I18n.t('crypto.errors.invalid_key')) unless verified?(key)
-  end
-
-  private
-
-  def verified?(key)
-    Ed25519.validate_key_bytes(key)
-  rescue ArgumentError
-    false
-  end
-end

app/validators/ed25519_signature_validator.rb

@@ -1,29 +0,0 @@
-# frozen_string_literal: true
-
-class Ed25519SignatureValidator < ActiveModel::EachValidator
-  def validate_each(record, attribute, value)
-    return if value.blank?
-
-    verify_key = Ed25519::VerifyKey.new(Base64.decode64(option_to_value(record, :verify_key)))
-    signature  = Base64.decode64(value)
-    message    = option_to_value(record, :message)
-
-    record.errors.add(attribute, I18n.t('crypto.errors.invalid_signature')) unless verified?(verify_key, signature, message)
-  end
-
-  private
-
-  def verified?(verify_key, signature, message)
-    verify_key.verify(signature, message)
-  rescue Ed25519::VerifyError, ArgumentError
-    false
-  end
-
-  def option_to_value(record, key)
-    if options[key].is_a?(Proc)
-      options[key].call(record)
-    else
-      record.public_send(options[key])
-    end
-  end
-end