Remove old attributes*.vm templates

Templates to remove:

web/standard/src/main/webapp/templates/attributes.vm
web/standard/src/main/webapp/templates/attributesinline.vm

They are not used any more (replaced by the "Information" tab), are
still in 1.0 syntax, are not internationalized (the only one used
translation is missing) and they also have some security issues.

Proposal:
http://lists.xwiki.org/pipermail/devs/2010-May/018754.html