m68k: remove reg.h

If reg.h exist, gdbserver fails to compile.
I am not sure if this header file is needed for anything.

libc/sysdeps/linux/m68k/sys/reg.h

@@ -1,88 +0,0 @@
-/* Copyright (C) 1998 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#ifndef _SYS_REG_H
-#define _SYS_REG_H	1
-
-/* Index into an array of 4 byte integers returned from ptrace for
-   location of the users' stored general purpose registers. */
-
-enum
-{
-  PT_D1 = 0,
-#define PT_D1 PT_D1
-  PT_D2 = 1,
-#define PT_D2 PT_D2
-  PT_D3 = 2,
-#define PT_D3 PT_D3
-  PT_D4 = 3,
-#define PT_D4 PT_D4
-  PT_D5 = 4,
-#define PT_D5 PT_D5
-  PT_D6 = 5,
-#define PT_D6 PT_D6
-  PT_D7 = 6,
-#define PT_D7 PT_D7
-  PT_A0 = 7,
-#define PT_A0 PT_A0
-  PT_A1 = 8,
-#define PT_A1 PT_A1
-  PT_A2 = 9,
-#define PT_A2 PT_A2
-  PT_A3 = 10,
-#define PT_A3 PT_A3
-  PT_A4 = 11,
-#define PT_A4 PT_A4
-  PT_A5 = 12,
-#define PT_A5 PT_A5
-  PT_A6 = 13,
-#define PT_A6 PT_A6
-  PT_D0 = 14,
-#define PT_D0 PT_D0
-  PT_USP = 15,
-#define PT_USP PT_USP
-  PT_ORIG_D0 = 16,
-#define PT_ORIG_D0 PT_ORIG_D0
-  PT_SR = 17,
-#define PT_SR PT_SR
-  PT_PC = 18,
-#define PT_PC PT_PC
-  PT_FP0 = 21,
-#define PT_FP0 PT_FP0
-  PT_FP1 = 24,
-#define PT_FP1 PT_FP1
-  PT_FP2 = 27,
-#define PT_FP2 PT_FP2
-  PT_FP3 = 30,
-#define PT_FP3 PT_FP3
-  PT_FP4 = 33,
-#define PT_FP4 PT_FP4
-  PT_FP5 = 36,
-#define PT_FP5 PT_FP5
-  PT_FP6 = 39,
-#define PT_FP6 PT_FP6
-  PT_FP7 = 42,
-#define PT_FP7 PT_FP7
-  PT_FPCR = 45,
-#define PT_FPCR PT_FPCR
-  PT_FPSR = 46,
-#define PT_FPSR PT_FPSR
-  PT_FPIAR = 47
-#define PT_FPIAR PT_FPIAR
-};
-
-#endif	/* _SYS_REG_H */