Revert "core: add the possibility to provide help for custom rules"

This reverts commit 84c825f8e893bfb56847ab4a880c46066a41744f.

Turns out that the custom help is not available when the $(O) directory
has not been configure yet (i.e. when there is no .config already
filled).

Rather than trying to work around this limitation with dirty hacks, just
revert this feature. After all, this will not prevent an external.mk
from providing custom help anyway; it's just not gonna be advertised nor
displayed with the main help.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Peter Korsgaard <peter@korsgaard.com>
Cc: Jérôme Pouiller <jezz@sysmic.org>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

1 files changed, 0 insertions, 7 deletions

diff --git a/Makefile b/Makefile
index d205ac9eb3..0e4beb2d3b 100644
--- a/Makefile
+++ b/Makefile
@@ -968,7 +968,6 @@ endif
 	@echo '  source-check           - check selected packages for valid download URLs'
 	@echo '  external-deps          - list external packages used'
 	@echo '  legal-info             - generate info about license compliance'
-	@echo '  help-custom            - print help about custom actions (if any)'
 	@echo
 	@echo '  make V=0|1             - 0 => quiet build (default), 1 => verbose build'
 	@echo '  make O=dir             - Locate all output files in "dir", including .config'
@@ -977,12 +976,6 @@ endif
 	@echo 'it on-line at http://buildroot.org/docs.html'
 	@echo
 
-# This rule does nothing, it is expected to be overloaded by
-# a br2-external tree or a local.mk . However, it must exist,
-# as we reference it in the main help, above. Making the rule
-# .PHONY does not work.
-help-custom:
-
 list-defconfigs:
 	@echo 'Built-in configs:'
 	@$(foreach b, $(sort $(notdir $(wildcard $(TOPDIR)/configs/*_defconfig))), \