deleting old plugin

_plugins/WithinCategoryPostNavigation.rb

@@ -1,24 +0,0 @@
-module Jekyll
-	class WithinCategoryPostNavigation < Generator
-		def generate(site)
-			site.categories.each_pair do |category, posts|
-				posts.sort! { |a,b| b <=> a}
-				posts.each do |post|
-					index = posts.index post
-					next_in_category = nil
-					previous_in_category = nil
-					if index
-						if index < posts.length - 1
-							next_in_category = posts[index + 1]
-						end
-						if index > 0
-							previous_in_category = posts[index - 1]
-						end
-					end
-					post.data["next_in_category"] = next_in_category unless next_in_category.nil?
-					post.data["previous_in_category"] = previous_in_category unless previous_in_category.nil?
-				end
-			end
-		end
-	end
-end