Remove more duplication with concord

lib/mutant/strategy.rb

@@ -2,27 +2,7 @@ module Mutant
 
   # Abstract base class for killing strategies
   class Strategy
-    include AbstractType, Adamantium::Flat, Equalizer.new
-
-    # Return config
-    #
-    # @return [Config]
-    #
-    # @api private
-    #
-    attr_reader :config
-
-    # Initialize object
-    #
-    # @param [Config] config
-    #
-    # @return [undefined
-    #
-    # @api private
-    #
-    def initialize(config)
-      @config = config
-    end
+    include AbstractType, Adamantium::Flat, Concord::Public.new(:config)
 
     # Perform setup
     #

lib/mutant/strategy/rspec/dm2/lookup.rb

@@ -5,15 +5,7 @@ module Mutant
 
         # Example lookup for the rspec dm2
         class Lookup
-          include AbstractType, Adamantium::Flat, Equalizer.new(:subject)
-
-          # Return subject
-          #
-          # @return [Subject]
-          #
-          # @api private
-          #
-          attr_reader :subject
+          include AbstractType, Adamantium::Flat, Concord::Public.new(:subject)
 
           # Return glob expression
           #
@@ -23,16 +15,6 @@ module Mutant
           #
           abstract_method :spec_files
 
-          # Initalize object
-          #
-          # @param [Mutation] mutation
-          #
-          # @api private
-          #
-          def initialize(subject)
-            @subject = subject
-          end
-
           # Perform example lookup
           #
           # @param [Subject] subject