* gnu/packages/suckless.scm (slock): Update to 1.4. [source] Remove CVE-2016-6866 patch (no longer needed). * gnu/packages/patches/slock-CVE-2016-6866.patch: Delete file. * gnu/local.mk (dist_patch_DATA): Remove it. Signed-off-by: Leo Famulari <leo@famulari.name>