package/skeleton: drop $(HOST_DIR)/usr compatibility symlink

It has been years that we removed $(HOST_DIR)/usr. Because of this
symlink, however, there are still packages that install things in
$(HOST_DIR)/usr. Remove the symlink so those packages will start to
fail.

Note that there's now a check-package check to detect such incorrectly
instaled things, so this should only affect external packages.

Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/skeleton/skeleton.mk

@@ -11,11 +11,7 @@
 SKELETON_ADD_TOOLCHAIN_DEPENDENCY = NO
 SKELETON_ADD_SKELETON_DEPENDENCY = NO
 
-# We create a compatibility symlink in case a post-build script still
-# uses $(HOST_DIR)/usr
 define HOST_SKELETON_INSTALL_CMDS
-# check-package DoNotInstallToHostdirUsr
-	$(Q)ln -snf . $(HOST_DIR)/usr
 	$(Q)mkdir -p $(HOST_DIR)/lib
 	$(Q)mkdir -p $(HOST_DIR)/include
 	$(Q)case $(HOSTARCH) in \