When a page is deleted all redirects that target that page should be deleted as well

Steps to reproduce:

• create page http://127.0.0.1:8080/xwiki/bin/view/a/b/
• create page http://127.0.0.1:8080/xwiki/bin/view/1/2/ (pages a and 1 don't need to be created)
• rename page 2, check "CREATE AN AUTOMATIC REDIRECT" and choose page b as the new location
  The page is successfully renamed and if you access it you will be redirected to http://127.0.0.1:8080/xwiki/bin/view/a/b/2/
• delete the page b (check affect children)
• try to create again the page http://127.0.0.1:8080/xwiki/bin/view/1/2/; create this page and edit path 1/2/
  You get redirected to http://127.0.0.1:8080/xwiki/bin/view/a/b/2/ and the new created page has the breadcrumb of the old page.
  The redirect that was done to page b is not deleted.
  If you don't have "display hidden documents=yes" in your user profile you don't see the hidden page http://127.0.0.1:8080/xwiki/bin/view/a/b/2/ and it creates confusion.
  As an improvement when you delete a document all redirects done to that document should be deleted.