Revert "Update support for Emoji 4.0 (Unicode 9.0)"

Rakefile

@@ -1,15 +1,16 @@
-require 'json'
-require 'fileutils'
-
+# Generates a table to be copy and pasted into the readme when emojis are updated
+#
 # To run via Docker:
 #
 #   docker run -it --rm -v "$(pwd)":/src ruby bash -c "cd /src && bundle install && rake"
 
+require 'json'
+
 desc "Pick a random emoji"
 task :random do
   emojis = []
 
-  emojis_dir = __dir__
+  emojis_dir = File.dirname(__FILE__)
   Dir.glob("#{emojis_dir}/img-*.json").each do |catalogue|
     emojis.concat JSON.parse(File.read(catalogue)).reverse
   end
@@ -19,7 +20,6 @@ task :random do
   puts ":#{emoj['name']}:"
 end
 
-desc "Generate a table to be copy and pasted into the readme when emojis are updated"
 task :default do
   emojis = []
 
@@ -73,7 +73,8 @@ task :default do
   end
 end
 
-def preprocess_emoji_json(parsed)
+task :generate do
+  parsed = JSON.parse(File.read(ENV.fetch("EMOJI_JSON")))
   new = []
 
   parsed.each do |e|
@@ -109,29 +110,5 @@ def preprocess_emoji_json(parsed)
     }
   end
 
-  JSON.pretty_generate(new)
-end
-
-desc "Generate and show processed emoji data file"
-task :generate do
-  parsed = JSON.parse(File.read(ENV.fetch("EMOJI_JSON")))
-  puts preprocess_emoji_json(parsed)
-end
-
-desc "Synchronise emoji data and images"
-task :sync do
-  puts 'Synchronising Unicode emoji images...'
-  FileUtils.cp(
-    Dir["#{__dir__}/node_modules/emoji-datasource-apple/img/apple/64/*.png"],
-    "#{__dir__}/img-apple-64"
-  )
-
-  puts 'Synchronising Unicode emoji metadata...'
-  unicode_emoji_catalogue = JSON.parse(File.read("#{__dir__}/node_modules/emoji-datasource-apple/emoji.json"))
-  File.write(
-    "#{__dir__}/img-apple-64.json",
-    preprocess_emoji_json(unicode_emoji_catalogue)
-  )
-
-  puts 'Done!'
+  puts JSON.pretty_generate(new)
 end