remove unneeded Relation#all from RepositoryMercurialTest

git-svn-id: http://svn.redmine.org/redmine/trunk@12576 e93f8b46-1217-0410-a6f0-8f06a7374b81
remove unneeded Relation#all from RepositorySubversionTest

git-svn-id: http://svn.redmine.org/redmine/trunk@12577 e93f8b46-1217-0410-a6f0-8f06a7374b81