why-error.md: Remove misc/coreutils.sh

Co-authored-by: Daniel Hofstetter <[email protected]>

Author: oech3

util/why-error.md

@@ -13,7 +13,6 @@ This file documents why some tests are failing:
 * gnu/tests/ls/ls-misc.pl
 * gnu/tests/ls/stat-free-symlinks.sh
 * gnu/tests/misc/close-stdout.sh
-* gnu/tests/misc/coreutils.sh
 * gnu/tests/misc/nohup.sh
 * gnu/tests/numfmt/numfmt.pl - https://github.com/uutils/coreutils/issues/7219 / https://github.com/uutils/coreutils/issues/7221
 * gnu/tests/misc/stdbuf.sh - https://github.com/uutils/coreutils/issues/7072