gnu: libtiff: Update to 4.0.5.
* gnu/packages/patches/libtiff-CVE-2012-4564.patch,
gnu/packages/patches/libtiff-CVE-2013-1960.patch,
gnu/packages/patches/libtiff-CVE-2013-1961.patch,
gnu/packages/patches/libtiff-CVE-2013-4231.patch,
gnu/packages/patches/libtiff-CVE-2013-4232.patch,
gnu/packages/patches/libtiff-CVE-2013-4243.patch,
gnu/packages/patches/libtiff-CVE-2013-4244.patch,
gnu/packages/patches/libtiff-CVE-2014-8127-pt1.patch,
gnu/packages/patches/libtiff-CVE-2014-8127-pt2.patch,
gnu/packages/patches/libtiff-CVE-2014-8127-pt3.patch,
gnu/packages/patches/libtiff-CVE-2014-8127-pt4.patch,
gnu/packages/patches/libtiff-CVE-2014-8128-pt1.patch,
gnu/packages/patches/libtiff-CVE-2014-8128-pt2.patch,
gnu/packages/patches/libtiff-CVE-2014-8128-pt3.patch,
gnu/packages/patches/libtiff-CVE-2014-8128-pt4.patch,
gnu/packages/patches/libtiff-CVE-2014-8128-pt5.patch,
gnu/packages/patches/libtiff-CVE-2014-8129.patch,
gnu/packages/patches/libtiff-CVE-2014-9330.patch,
gnu/packages/patches/libtiff-CVE-2014-9655.patch: Delete files.
* gnu-system.am (dist_patch_DATA): Unregister the patches.
* gnu/packages/image.scm (libtiff): Update to 4.0.5 and drop the patches.