linux: drop unused 5.15 version

* 6.1 version was used by default since mickledore:
  12a1187b01
  and kirkstone for rpi5 MACHINEs since:
  9dc6673d41

* scarthgap uses 6.6 by default since:
  1cf3dd5e5e

* nobody is probably using 5.15 with newer release and there are issues with "iw reg" since
  wireless-regdb upgrade in oe-core as well as shown in:
  https://github.com/agherzan/meta-raspberrypi/pull/1317
  so better to drop it from master/scarthgap together with
  rpi.scc used only for 5.15 and 0001-gcc-plugins-Reorganize-gimple-includes-for-GCC-13.patch
  used only by rpi.scc

Signed-off-by: Martin Jansa <martin.jansa@gmail.com>

recipes-kernel/linux/files/0001-gcc-plugins-Reorganize-gimple-includes-for-GCC-13.patch

@@ -1,50 +0,0 @@
-From 32f53700aeef2f5c7797ddda66348fc0b29e1047 Mon Sep 17 00:00:00 2001
-From: Kees Cook <keescook@chromium.org>
-Date: Wed, 18 Jan 2023 12:21:35 -0800
-Subject: [PATCH] gcc-plugins: Reorganize gimple includes for GCC 13
-
-The gimple-iterator.h header must be included before gimple-fold.h
-starting with GCC 13. Reorganize gimple headers to work for all GCC
-versions.
-
-Reported-by: Palmer Dabbelt <palmer@rivosinc.com>
-Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
-Link: https://lore.kernel.org/all/20230113173033.4380-1-palmer@rivosinc.com/
-Cc: linux-hardening@vger.kernel.org
-Signed-off-by: Kees Cook <keescook@chromium.org>
----
-Upstream-Status: Pending
-
- scripts/gcc-plugins/gcc-common.h | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/scripts/gcc-plugins/gcc-common.h b/scripts/gcc-plugins/gcc-common.h
-index 0c087614fc3e..27770c31214c 100644
---- a/scripts/gcc-plugins/gcc-common.h
-+++ b/scripts/gcc-plugins/gcc-common.h
-@@ -77,8 +77,10 @@
- #include "varasm.h"
- #include "stor-layout.h"
- #include "internal-fn.h"
-+#include "gimple.h"
- #include "gimple-expr.h"
- #include "gimple-fold.h"
-+#include "gimple-iterator.h"
- #include "context.h"
- #include "tree-ssa-alias.h"
- #include "tree-ssa.h"
-@@ -91,11 +93,9 @@
- #include "tree-eh.h"
- #include "stmt.h"
- #include "gimplify.h"
--#include "gimple.h"
- #include "tree-ssa-operands.h"
- #include "tree-phinodes.h"
- #include "tree-cfg.h"
--#include "gimple-iterator.h"
- #include "gimple-ssa.h"
- #include "ssa-iterators.h"
- 
--- 
-2.39.1
-

recipes-kernel/linux/files/rpi.scc

@@ -1 +0,0 @@
-patch 0001-gcc-plugins-Reorganize-gimple-includes-for-GCC-13.patch

recipes-kernel/linux/linux-raspberrypi-v7_5.15.bb

@@ -1,6 +0,0 @@
-# SPDX-FileCopyrightText: Andrei Gherzan <andrei.gherzan@huawei.com>
-#
-# SPDX-License-Identifier: MIT
-
-require linux-raspberrypi-v7.inc
-require linux-raspberrypi_5.15.bb

recipes-kernel/linux/linux-raspberrypi_5.15.bb

@@ -1,32 +0,0 @@
-LINUX_VERSION ?= "5.15.92"
-LINUX_RPI_BRANCH ?= "rpi-5.15.y"
-LINUX_RPI_KMETA_BRANCH ?= "yocto-5.15"
-
-SRCREV_machine = "14b35093ca68bf2c81bbc90aace5007142b40b40"
-SRCREV_meta = "509f4b9d68337f103633d48b621c1c9aa0dc975d"
-
-KMETA = "kernel-meta"
-
-SRC_URI = " \
-    git://github.com/raspberrypi/linux.git;name=machine;branch=${LINUX_RPI_BRANCH};protocol=https \
-    git://git.yoctoproject.org/yocto-kernel-cache;type=kmeta;name=meta;branch=${LINUX_RPI_KMETA_BRANCH};destsuffix=${KMETA} \
-    file://rpi.scc \
-    file://powersave.cfg \
-    file://android-drivers.cfg \
-    "
-
-require linux-raspberrypi.inc
-
-KERNEL_DTC_FLAGS += "-@ -H epapr"
-
-RDEPENDS:${KERNEL_PACKAGE_NAME}:raspberrypi-armv7:append = " ${RASPBERRYPI_v7_KERNEL_PACKAGE_NAME}"
-RDEPENDS:${KERNEL_PACKAGE_NAME}-base:raspberrypi-armv7:append = " ${RASPBERRYPI_v7_KERNEL_PACKAGE_NAME}-base"
-RDEPENDS:${KERNEL_PACKAGE_NAME}-image:raspberrypi-armv7:append = " ${RASPBERRYPI_v7_KERNEL_PACKAGE_NAME}-image"
-RDEPENDS:${KERNEL_PACKAGE_NAME}-dev:raspberrypi-armv7:append = " ${RASPBERRYPI_v7_KERNEL_PACKAGE_NAME}-dev"
-RDEPENDS:${KERNEL_PACKAGE_NAME}-vmlinux:raspberrypi-armv7:append = " ${RASPBERRYPI_v7_KERNEL_PACKAGE_NAME}-vmlinux"
-RDEPENDS:${KERNEL_PACKAGE_NAME}-modules:raspberrypi-armv7:append = " ${RASPBERRYPI_v7_KERNEL_PACKAGE_NAME}-modules"
-RDEPENDS:${KERNEL_PACKAGE_NAME}-dbg:raspberrypi-armv7:append = " ${RASPBERRYPI_v7_KERNEL_PACKAGE_NAME}-dbg"
-
-DEPLOYDEP = ""
-DEPLOYDEP:raspberrypi-armv7 = "${RASPBERRYPI_v7_KERNEL}:do_deploy"
-do_deploy[depends] += "${DEPLOYDEP}"