Revert failed April Fool's Day joke

This reverts commit f8eec3523a.

Gemfile

@@ -7,7 +7,6 @@ gem 'wolfram'
 gem 'puma'
 gem 'sinatra'
 gem 'mechanize'
-gem 'xml-simple'
 gem 'nokogiri'
 
 group :development, :test do

Gemfile.lock

@@ -107,7 +107,6 @@ GEM
     websocket-extensions (0.1.2)
     wolfram (0.2.1)
       nokogiri (>= 1.4.3)
-    xml-simple (1.1.5)
 
 PLATFORMS
   ruby
@@ -123,7 +122,6 @@ DEPENDENCIES
   sinatra
   slack-ruby-bot (~> 0.6.0)
   wolfram
-  xml-simple
 
 BUNDLED WITH
    1.11.2

slack-pixiv.rb

@@ -1,7 +1,6 @@
 require 'slack-ruby-bot'
 require 'wolfram'
 require 'mechanize'
-require 'xmlsimple'
 require 'nokogiri'
 require 'slack-pixiv/commands/pixiv'
 require 'slack-pixiv/app'

slack-pixiv/commands/pixiv.rb

@@ -7,9 +7,6 @@ module SlackMathbot
         # Initalize Mechanize
         agent = Mechanize.new
 
-        # Get time
-        time = Time.now
-
         # Create Pixiv URL
         pixiv_url = "http://www.pixiv.net" + _match[:url][0..-2]
         puts pixiv_url
@@ -30,23 +27,8 @@ module SlackMathbot
         puts title
 
         # Scrape image
-        r = Range.new(
-          Time.local(time.year, time.month, time.day, 12),
-          Time.local(time.year, time.month, time.day, 20)
-        ) === time
-
-        if ((Date.today.to_s == "2016-04-01") && (r))
-          api_url = "http://rule34.paheal.net/api/danbooru/find_posts/index.xml"
-
-          agent.get(api_url)
-          xml = agent.current_page.body
-          status = XmlSimple.xml_in(xml)
-          image_url = status["post"].sample["file_url"]
-          puts agent.get(pixiv_url).images_with(:src => /600x600\/img-master/)[0].to_s.sub! '600x600','480x960'
-        else
-          image_url = agent.get(pixiv_url).images_with(:src => /600x600\/img-master/)[0].to_s.sub! '600x600','480x960'
-          puts image_url
-        end
+        image_url = agent.get(pixiv_url).images_with(:src => /600x600\/img-master/)[0].to_s.sub! '600x600','480x960'
+        puts image_url
 
         client.web_client.chat_postMessage(
           channel: _data.channel,