why-error.md: Cleanup (#9738)

Author: oech3

util/why-error.md

@@ -13,18 +13,15 @@ This file documents why some GNU tests are failing:
 * ls/ls-misc.pl
 * ls/stat-free-symlinks.sh
 * misc/close-stdout.sh
-* misc/nohup.sh
 * numfmt/numfmt.pl - https://github.com/uutils/coreutils/issues/7219 / https://github.com/uutils/coreutils/issues/7221
 * misc/stdbuf.sh - https://github.com/uutils/coreutils/issues/7072
 * misc/tsort.pl - https://github.com/uutils/coreutils/issues/7074
 * misc/write-errors.sh
-* od/od-float.sh
 * ptx/ptx-overrun.sh
 * ptx/ptx.pl
 * rm/one-file-system.sh - https://github.com/uutils/coreutils/issues/7011
 * rm/rm1.sh - https://github.com/uutils/coreutils/issues/9479
-* shred/shred-passes.sh
-* sort/sort-continue.sh
+* shred/shred-passes.sh - https://github.com/uutils/coreutils/pull/9317
 * sort/sort-debug-keys.sh
 * sort/sort-debug-warn.sh
 * sort/sort-float.sh
@@ -39,4 +36,3 @@ This file documents why some GNU tests are failing:
 * tail/symlink.sh
 * stty/stty-row-col.sh
 * stty/stty.sh
-* tty/tty-eof.pl