remove unused class

lib/squib/args/output_file.rb

@@ -1,40 +0,0 @@
-require_relative 'arg_loader'
-require_relative 'dir_validator'
-
-module Squib
-  # @api private
-  module Args
-    class OutputFile
-      include ArgLoader
-      include DirValidator
-
-      def initialize(dpi = 300)
-        @dpi = 300
-      end
-
-      def self.parameters
-        {
-          dir: '_output',
-          file: 'output.pdf'
-        }
-      end
-
-      def self.expanding_parameters
-        [] # none of them
-      end
-
-      def self.params_with_units
-        []
-      end
-
-      def validate_dir(arg)
-        ensure_dir_created(arg)
-      end
-
-      def full_filename
-        "#{dir}/#{file}"
-      end
-
-    end
-  end
-end