No need for MissingDependencyException

Author: Simeon F. Willbanks

lib/html/pipeline/filter.rb

@@ -27,23 +27,6 @@ class Pipeline
     # Each filter may define additional options and output values. See the class
     # docs for more info.
     class Filter
-      # Public: Custom Exception raised when a Filter dependency is not installed.
-      #
-      # Examples
-      #
-      #   begin
-      #     require "rinku"
-      #   rescue LoadError => e
-      #     missing = HTML::Pipeline::Filter::MissingDependencyException
-      #     raise missing, missing::MESSAGE % "rinku", e.backtrace
-      #   end
-      class MissingDependencyException < StandardError
-        # Public: Format String for MissingDependencyException message.
-        MESSAGE = "Missing html-pipeline dependency: " +
-                  "Please add `%s` to your Gemfile; " +
-                  "see html-pipeline Gemfile for version."
-      end
-
       class InvalidDocumentException < StandardError; end
 
       def initialize(doc, context = nil, result = nil)