On the 1.7.x-issue4153 branch: Remove some duplicated tests.

r1514944 on 1.7.x added some tests that are roughly identical to the tests
being added by this branch.  This branch is pulling in the tests that match
the tests on trunk for this purpose.  So keep those tests.

* subversion/tests/cmdline/diff_tests.py:
  (basic_diff_summarize): Remove duplicated add file and dir tests.


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.7.x-issue4153@1535590 13f79535-47bb-0310-9956-ffa450edef68