Revert re-introduction of PageDrop

Reverts commit 1bfb12b210.

lib/jekyll/drops/page_drop.rb

@@ -1,18 +0,0 @@
-# frozen_string_literal: true
-
-module Jekyll
-  module Drops
-    class PageDrop < Drop
-      extend Forwardable
-
-      mutable false
-
-      def_delegators :@obj, :content, :dir, :name, :path, :url, :excerpt
-      private def_delegator :@obj, :data, :fallback_data
-
-      def title
-        @obj.data["title"]
-      end
-    end
-  end
-end

lib/jekyll/page.rb

@@ -71,38 +71,6 @@ module Jekyll
       end
     end
 
-    # For backwards-compatibility in subclasses that do not redefine
-    # the `:to_liquid` method, stash existing definition under a new name
-    #
-    # TODO: Remove in Jekyll 5.0
-    alias_method :legacy_to_liquid, :to_liquid
-    private :legacy_to_liquid
-
-    # Private
-    # Subclasses can choose to optimize their `:to_liquid` method by wrapping
-    # it around this definition.
-    #
-    # TODO: Remove in Jekyll 5.0
-    def liquid_drop
-      @liquid_drop ||= begin
-        defaults = site.frontmatter_defaults.all(relative_path, type)
-        unless defaults.empty?
-          Utils.deep_merge_hashes!(data, Utils.deep_merge_hashes!(defaults, data))
-        end
-        Drops::PageDrop.new(self)
-      end
-    end
-    private :liquid_drop
-
-    # Public
-    #
-    # Liquid representation of current page
-    #
-    # TODO: Remove optional parameter in Jekyll 5.0
-    def to_liquid(attrs = nil)
-      self.class == Jekyll::Page ? liquid_drop : legacy_to_liquid(attrs)
-    end
-
     # The full path and filename of the post. Defined in the YAML of the post
     # body.
     #