Cleanup unused method (#51)

* Cleanup unused method

* Added CHANGELOG

Author: ROunofF

CHANGELOG.md

@@ -10,6 +10,8 @@ This CHANGELOG follows the format listed at [Keep A Changelog](http://keepachang
 ### Fixed
 - Error handling in graphite handlers
 - Duplicate short option in check-graphite.rb
+### Removed
+- Method retrieve_data in check-graphite-data since it's duplicate from graphite_proxy
 
 ## [2.0.0] - 2016-06-21
 ### Added

bin/check-graphite-data.rb

@@ -84,70 +84,6 @@ def check_age
     end
   end
 
-  # grab data from graphite
-  def retrieve_data
-    unless @raw_data
-      begin
-        unless config[:server].start_with?('https://', 'http://')
-          config[:server].prepend('http://')
-        end
-
-        url = "#{config[:server]}/render?format=json&target=#{formatted_target}&from=#{config[:from]}&until=#{config[:until]}"
-
-        url_opts = {}
-
-        if config[:no_ssl_verify]
-          url_opts[:ssl_verify_mode] = OpenSSL::SSL::VERIFY_NONE
-        end
-
-        if config[:username] && (config[:password] || config[:passfile])
-          if config[:passfile]
-            pass = File.open(config[:passfile]).readline
-          elsif config[:password]
-            pass = config[:password]
-          end
-
-          url_opts[:http_basic_authentication] = [config[:username], pass.chomp]
-        end # we don't have both username and password trying without
-
-        handle = open(url, url_opts)
-
-        @raw_data = handle.gets
-        if @raw_data == '[]'
-          unknown 'Empty data received from Graphite - metric probably doesn\'t exist'
-        else
-          @json_data = JSON.parse(@raw_data)
-          output = {}
-          @json_data.each do |raw|
-            raw['datapoints'].delete_if { |v| v.first.nil? }
-            next if raw['datapoints'].empty?
-            target = raw['target']
-            data = raw['datapoints'].map(&:first)
-            start = raw['datapoints'].first.last
-            dend = raw['datapoints'].last.last
-            step = ((dend - start) / raw['datapoints'].size.to_f).ceil
-            output[target] = { 'target' => target, 'data' => data, 'start' => start, 'end' => dend, 'step' => step }
-          end
-          output
-        end
-      rescue SocketError
-        unknown 'Failed to connect to graphite server'
-      rescue OpenURI::HTTPError
-        unknown 'Server error or invalid graphite expression'
-      rescue NoMethodError
-        unknown 'No data for time period and/or target'
-      rescue Errno::ECONNREFUSED
-        unknown 'Connection refused when connecting to Graphite server'
-      rescue Errno::ECONNRESET
-        unknown 'Connection reset by peer when connecting to Graphite server'
-      rescue EOFError
-        unknown 'End of file error when reading from Graphite server'
-      rescue => e
-        unknown "An unknown error occurred: #{e.inspect}"
-      end
-    end
-  end
-
   # type:: :warning or :critical
   # Return alert if required
   def check(type)