Remove wrong comment from example db config

config/database.yml.example

@@ -1,10 +1,3 @@
-# MySQL.  Versions 4.1 and 5.0 are recommended.
-#
-# Install the MySQL driver:
-#   gem install mysql2
-#
-# And be sure to use new-style password hashing:
-#   http://dev.mysql.com/doc/refman/5.0/en/old-client.html
 development:
   adapter: postgresql
   encoding: unicode