Remove hello plugin.

data/plugins/hello/hello.rb

@@ -1,8 +0,0 @@
-require 'java'
-java_import 'org.apollo.game.model.Animation'
-java_import 'org.apollo.game.model.World'
-
-on :command, :hello do |player, command|
-  player.play_animation Animation::WAVE
-  player.send_message("Hello, World!")
-end

data/plugins/hello/plugin.xml

@@ -1,14 +0,0 @@
-<?xml version="1.0"?>
-<plugin>
-  <id>hello</id>
-  <version>1</version>
-  <name>Hello World Command</name>
-  <description>Adds a ::hello command which simply prints 'Hello, World!'.</description>
-  <authors>
-    <author>Graham</author>
-  </authors>
-  <scripts>
-    <script>hello.rb</script>
-  </scripts>
-  <dependencies />
-</plugin>