kirkstone: Remove gcc bbappend

Since honister and gcc11 it seems not necessary to include the
"Fix-argument-list-too-long-error.patch" anymore.
Remove the patch and the bbappend as well.

recipes-devtools/gcc/files/0012-gcc-Fix-argument-list-too-long-error.patch

-From faa0f712a67005ef0260f95eebe7c7c57a6f8360 Mon Sep 17 00:00:00 2001
-From: Khem Raj <raj.khem@gmail.com>
-Date: Fri, 29 Mar 2013 09:26:37 +0400
-Subject: [PATCH 12/39] gcc: Fix argument list too long error.
-
-There would be an "Argument list too long" error when the
-build directory is longer than 200, this is caused by:
-
-headers=`echo $(PLUGIN_HEADERS) | tr ' ' '\012' | sort -u`
-
-The PLUGIN_HEADERS is too long before sort, so the "echo" can't handle
-it, use the $(sort list) of GNU make which can handle the too long list
-would fix the problem, the header would be short enough after sorted.
-The "tr ' ' '\012'" was used for translating the space to "\n", the
-$(sort list) doesn't need this.
-
-Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
-Signed-off-by: Khem Raj <raj.khem@gmail.com>
-
-Upstream-Status: Pending
----
- gcc/Makefile.in | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/gcc/Makefile.in b/gcc/Makefile.in
-index fef6c4c61e3..57cf7804f0a 100644
---- a/gcc/Makefile.in
-+++ b/gcc/Makefile.in
-@@ -3538,7 +3538,7 @@ install-plugin: installdirs lang.install-plugin s-header-vars install-gengtype
- # We keep the directory structure for files in config or c-family and .def
- # files. All other files are flattened to a single directory.
- 	$(mkinstalldirs) $(DESTDIR)$(plugin_includedir)
--	headers=`echo $(PLUGIN_HEADERS) $$(cd $(srcdir); echo *.h *.def) | tr ' ' '\012' | sort -u`; \
-+	headers="$(sort $(PLUGIN_HEADERS) $$(cd $(srcdir); echo *.h *.def))"; \
- 	srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*|]/\\\\&/g'`; \
- 	for file in $$headers; do \
- 	  if [ -f $$file ] ; then \
--- 
-2.25.1
-

recipes-devtools/gcc/gcc-source_9.3.bbappend

-FILESEXTRAPATHS:prepend := "${THISDIR}/files:"