Remove a diff helper function under that assumption that there are no entries
without urls in WC-NG.

* subversion/libsvn_client/diff.c
  (convert_to_url): Remove function.
  (diff_prepare_repos_repos,
   diff_repos_wc): Call svn_wc__node_get_url directly in local path case.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1442538 13f79535-47bb-0310-9956-ffa450edef68
For easier code navigation: separate cleanup from upgrade in libsvn_client.
We decided that after 1.7 explicit upgrades will still be required.

No functional changes, but gen-make required.

* subversion/libsvn_client/cleanup.c
  (*): Remove everything upgrade specific.

* subversion/libsvn_client/upgrade.c
  (*): Remove everything cleanup specific.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1442545 13f79535-47bb-0310-9956-ffa450edef68