package/coreutils: remove legacy comment

This comment was added in 2007 (e4c6340a: cleanup and fixes), back when
removing a package was (seemingly) supported.

This ability was lost when coreutils was converted to autotarget in 2010
(386183f: coreutils: convert to autotarget), but the comment stuck.

Get rid of it: it nowadays does not make sense and is a bit confusing.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/coreutils/coreutils.mk

@@ -123,7 +123,4 @@ endef
 
 COREUTILS_POST_INSTALL_TARGET_HOOKS += COREUTILS_CLEANUP
 
-# If both coreutils and busybox are selected, the corresponding applets
-# may need to be reinstated by the clean targets.
-
 $(eval $(autotools-package))