Remove custom_emoji aliases property from part of rest api

app/serializers/rest/custom_emoji_slim_serializer.rb

@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+class REST::CustomEmojiSlimSerializer < ActiveModel::Serializer
+  include RoutingHelper
+
+  attributes :shortcode, :url, :static_url, :visible_in_picker
+
+  attribute :category, if: :category_loaded?
+  attribute :width, if: :width?
+  attribute :height, if: :height?
+  attribute :sensitive, if: :sensitive?
+
+  def url
+    full_asset_url(object.image.url)
+  end
+
+  def static_url
+    full_asset_url(object.image.url(:static))
+  end
+
+  def category
+    object.category.name
+  end
+
+  def category_loaded?
+    object.association(:category).loaded? && object.category.present?
+  end
+
+  def width?
+    object.respond_to?(:image_width) || object.respond_to?(:width)
+  end
+
+  def height?
+    object.respond_to?(:image_height) || object.respond_to?(:height)
+  end
+
+  def width
+    object.respond_to?(:image_width) ? object.image_width : object.width
+  end
+
+  def height
+    object.respond_to?(:image_height) ? object.image_height : object.height
+  end
+
+  def sensitive?
+    object.respond_to?(:is_sensitive)
+  end
+
+  def sensitive
+    object.is_sensitive
+  end
+end