Better MySQL Error message. [#3775 state:resolved]

Signed-off-by: NJosé Valim <jose.valim@gmail.com>

activerecord/lib/active_record/connection_adapters/mysql_adapter.rb

@@ -61,7 +61,7 @@ def self.mysql_connection(config) # :nodoc:
         begin
           require_library_or_gem('mysql')
         rescue LoadError
-          $stderr.puts '!!! The bundled mysql.rb driver has been removed from Rails 2.2. Please install the mysql gem and try again: gem install mysql.'
+          $stderr.puts '!!! Please install the mysql gem and try again: gem install mysql.'
           raise
         end
       end