Remove GollumTagsPipeline

lib/banzai/pipeline/gollum_tags_pipeline.rb

-require 'banzai'
-
-module Banzai
-  module Pipeline
-    class GollumTagsPipeline < BasePipeline
-      def self.filters
-        [
-          Filter::GollumTagsFilter
-        ]
-      end
-    end
-  end
-end

lib/banzai/pipeline/wiki_pipeline.rb

@@ -2,8 +2,10 @@ require 'banzai'
 module Banzai
   module Pipeline
-    class WikiPipeline < CombinedPipeline.new(PlainMarkdownPipeline, GollumTagsPipeline, GfmPipeline)
-
+    class WikiPipeline < FullPipeline
+      def self.filters
+        super.insert(1, Filter::GollumTagsFilter)
+      end
     end
   end
 end