Remove unused locals

git-svn-id: http://protobuf-net.googlecode.com/svn/trunk@657 b72047a4-3652-0410-9617-b3994939e97b
update mono build target

git-svn-id: http://protobuf-net.googlecode.com/svn/trunk@658 b72047a4-3652-0410-9617-b3994939e97b