Remove Processing module

lib/youplot/backends/processing.rb

@@ -1,17 +0,0 @@
-# frozen_string_literal: true
-
-require 'enumerable/statistics'
-
-module YouPlot
-  # plotting functions.
-  module Backends
-    module Processing
-      module_function
-
-      def count_values(arr, tally: true)
-        a = arr.value_counts
-        [a.keys, a.values]
-      end
-    end
-  end
-end

lib/youplot/backends/unicode_plot_backend.rb

@@ -1,6 +1,5 @@
 # frozen_string_literal: true
 
-require_relative 'processing'
 require 'unicode_plot'
 
 module YouPlot
@@ -16,7 +15,7 @@ module YouPlot
         series = data.series
         # `uplot count`
         if count
-          series = Processing.count_values(series[0])
+          series = series[0].value_counts.yield_self { |h| [h.keys, h.values] }
           params.title = headers[0] if headers
         end
         if series.size == 1