Remove ie7_password_unittest_win.cc from unit_tests target.

This was added to components_unittests target in r232764
(crrev.com/232764), but I forgot to remove it from unit_tests target at the same
time. Removing now.

BUG=181277
TEST=components_unittests
R=thestig@chromium.org

Review URL: https://codereview.chromium.org/83273008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236974 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236974