regex.c sync with libc broken

[Karl Berry]

Looks like the pragmas recently added to lib/regex.c have not been
installed upstream. I did the sync from libc anyway ... -k

*** lib/regex.c Sun Dec 31 00:26:03 2023
--- /tmp/gnulib.srclist/regex.c Tue Jan  2 00:26:37 2024
***************
*** 1,4 ****
  /* Extended regular expression matching and search library.
!    Copyright (C) 2002-2023 Free Software Foundation, Inc.
     This file is part of the GNU C Library.
     Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
--- 1,4 ----
  /* Extended regular expression matching and search library.
!    Copyright (C) 2002-2024 Free Software Foundation, Inc.
     This file is part of the GNU C Library.
     Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
***************
*** 27,34 ****
  #  pragma GCC diagnostic ignored "-Wvla"
  # endif
- # if __GNUC_PREREQ (4, 3)
- #  pragma GCC diagnostic ignored "-Wold-style-definition"
- #  pragma GCC diagnostic ignored "-Wtype-limits"
- # endif
  #endif
  
--- 27,30 ----