Remove 40-microcode.install now that upstream has added support

src/etc/kernel/install.d/40-microcode.install

@@ -1,26 +0,0 @@
-#!/bin/bash
-# SPDX-License-Identifier: GPL-2.0-only
-
-COMMAND="${1:?}"
-# shellcheck disable=SC2034
-KERNEL_VERSION="${2:?}"
-# shellcheck disable=SC2034
-ENTRY_DIR_ABS="$3"
-# shellcheck disable=SC2034
-KERNEL_IMAGE="$4"
-
-set -e
-
-[[ "$COMMAND" = "add" ]] || exit 0
-
-for dir in "${KERNEL_INSTALL_BOOT_ROOT}" "/boot"; do
-    for microcode in "intel-ucode.img" "amd-ucode.img"; do
-        if [[ -f "${dir}/${microcode}" ]]; then
-            install -m 0644 "${dir}/${microcode}" "${KERNEL_INSTALL_STAGING_AREA}/microcode-${microcode}" || {
-                echo "Error: could not copy '$microcode' to the staging area." >&2
-                exit 1
-            }
-            (( KERNEL_INSTALL_VERBOSE )) && printf "+ Found microcode image %s\n" "$microcode" || exit 0
-        fi
-    done
-done