Removed architecture/{powerpc64,sparc64,x86-64}/boot/boot.in because they were only used to source boot.in from the not-64 flavor of the arch

architecture/powerpc64/boot/boot.in

@@ -1,19 +0,0 @@
-# --- SDE-COPYRIGHT-NOTE-BEGIN ---
-# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
-#
-# Filename: architecture/powerpc64/boot/boot.in
-# Copyright (C) 2006 The T2 SDE Project
-#
-# More information can be found in the files COPYING and README.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; version 2 of the License. A copy of the
-# GNU General Public License can be found in the file COPYING.
-# --- SDE-COPYRIGHT-NOTE-END ---
-
-
-# for powerpc64 we mostly use the same yaboot stuff, thus we reuse the
-# powerpc boot-loader code
-. $base/architecture/powerpc/boot/boot.in
-

architecture/sparc64/boot/boot.in

@@ -1,19 +0,0 @@
-# --- SDE-COPYRIGHT-NOTE-BEGIN ---
-# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
-#
-# Filename: architecture/sparc64/boot/boot.in
-# Copyright (C) 2006 The T2 SDE Project
-#
-# More information can be found in the files COPYING and README.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; version 2 of the License. A copy of the
-# GNU General Public License can be found in the file COPYING.
-# --- SDE-COPYRIGHT-NOTE-END ---
-
-
-# for sparc64 we mostly use the same silo stuff, thus we reuse the
-# sparc boot-loader code
-. $base/architecture/sparc/boot/boot.in
-

architecture/x86-64/boot/boot.in

@@ -1,19 +0,0 @@
-# --- SDE-COPYRIGHT-NOTE-BEGIN ---
-# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
-#
-# Filename: architecture/x86-64/boot/boot.in
-# Copyright (C) 2006 The T2 SDE Project
-#
-# More information can be found in the files COPYING and README.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; version 2 of the License. A copy of the
-# GNU General Public License can be found in the file COPYING.
-# --- SDE-COPYRIGHT-NOTE-END ---
-
-
-# x86-64 is enhanced x86 with the same real-mode junk and thus shares
-# the boot-loader with class x86
-. $base/architecture/x86/boot/boot.in
-