diff --git a/m4/xc-translit.m4 b/m4/xc-translit.m4
deleted file mode 100644
index 0d898f511f..0000000000
--- a/m4/xc-translit.m4
+++ /dev/null
@@ -1,165 +0,0 @@
-#---------------------------------------------------------------------------
-#
-# xc-translit.m4
-#
-# Copyright (C) Daniel Stenberg, <daniel@haxx.se>
-#
-# Permission to use, copy, modify, and distribute this software for any
-# purpose with or without fee is hereby granted, provided that the above
-# copyright notice and this permission notice appear in all copies.
-#
-# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-#
-# SPDX-License-Identifier: ISC
-#
-#---------------------------------------------------------------------------
-
-# File version for 'aclocal' use. Keep it a single number.
-# serial 2
-
-
-dnl XC_SH_TR_SH (expression)
-dnl -------------------------------------------------
-dnl Shell execution time transliteration of 'expression'
-dnl argument, where all non-alfanumeric characters are
-dnl converted to the underscore '_' character.
-dnl Normal shell expansion and substitution takes place
-dnl for given 'expression' at shell execution time before
-dnl transliteration is applied to it.
-
-AC_DEFUN([XC_SH_TR_SH],
-[`echo "$1" | sed 's/[[^a-zA-Z0-9_]]/_/g'`])
-
-
-dnl XC_SH_TR_SH_EX (expression, [extra])
-dnl -------------------------------------------------
-dnl Like XC_SH_TR_SH but transliterating characters
-dnl given in 'extra' argument to lowercase 'p'. For
-dnl example [*+], [*], and [+] are valid 'extra' args.
-
-AC_DEFUN([XC_SH_TR_SH_EX],
-[ifelse([$2], [],
-  [XC_SH_TR_SH([$1])],
-  [`echo "$1" | sed 's/[[$2]]/p/g' | sed 's/[[^a-zA-Z0-9_]]/_/g'`])])
-
-
-dnl XC_M4_TR_SH (expression)
-dnl -------------------------------------------------
-dnl m4 execution time transliteration of 'expression'
-dnl argument, where all non-alfanumeric characters are
-dnl converted to the underscore '_' character.
-
-AC_DEFUN([XC_M4_TR_SH],
-[patsubst(XC_QPATSUBST(XC_QUOTE($1),
-                       [[^a-zA-Z0-9_]], [_]),
-          [\(_\(.*\)_\)], [\2])])
-
-
-dnl XC_M4_TR_SH_EX (expression, [extra])
-dnl -------------------------------------------------
-dnl Like XC_M4_TR_SH but transliterating characters
-dnl given in 'extra' argument to lowercase 'p'. For
-dnl example [*+], [*], and [+] are valid 'extra' args.
-
-AC_DEFUN([XC_M4_TR_SH_EX],
-[ifelse([$2], [],
-  [XC_M4_TR_SH([$1])],
-  [patsubst(XC_QPATSUBST(XC_QPATSUBST(XC_QUOTE($1),
-                                      [[$2]],
-                                      [p]),
-                         [[^a-zA-Z0-9_]], [_]),
-            [\(_\(.*\)_\)], [\2])])])
-
-
-dnl XC_SH_TR_CPP (expression)
-dnl -------------------------------------------------
-dnl Shell execution time transliteration of 'expression'
-dnl argument, where all non-alfanumeric characters are
-dnl converted to the underscore '_' character and alnum
-dnl characters are converted to uppercase.
-dnl Normal shell expansion and substitution takes place
-dnl for given 'expression' at shell execution time before
-dnl transliteration is applied to it.
-
-AC_DEFUN([XC_SH_TR_CPP],
-[`echo "$1" | dnl
-sed 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' | dnl
-sed 's/[[^A-Z0-9_]]/_/g'`])
-
-
-dnl XC_SH_TR_CPP_EX (expression, [extra])
-dnl -------------------------------------------------
-dnl Like XC_SH_TR_CPP but transliterating characters
-dnl given in 'extra' argument to uppercase 'P'. For
-dnl example [*+], [*], and [+] are valid 'extra' args.
-
-AC_DEFUN([XC_SH_TR_CPP_EX],
-[ifelse([$2], [],
-  [XC_SH_TR_CPP([$1])],
-  [`echo "$1" | dnl
-sed 's/[[$2]]/P/g' | dnl
-sed 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' | dnl
-sed 's/[[^A-Z0-9_]]/_/g'`])])
-
-
-dnl XC_M4_TR_CPP (expression)
-dnl -------------------------------------------------
-dnl m4 execution time transliteration of 'expression'
-dnl argument, where all non-alfanumeric characters are
-dnl converted to the underscore '_' character and alnum
-dnl characters are converted to uppercase.
-
-AC_DEFUN([XC_M4_TR_CPP],
-[patsubst(XC_QPATSUBST(XC_QTRANSLIT(XC_QUOTE($1),
-                                    [abcdefghijklmnopqrstuvwxyz],
-                                    [ABCDEFGHIJKLMNOPQRSTUVWXYZ]),
-                       [[^A-Z0-9_]], [_]),
-          [\(_\(.*\)_\)], [\2])])
-
-
-dnl XC_M4_TR_CPP_EX (expression, [extra])
-dnl -------------------------------------------------
-dnl Like XC_M4_TR_CPP but transliterating characters
-dnl given in 'extra' argument to uppercase 'P'. For
-dnl example [*+], [*], and [+] are valid 'extra' args.
-
-AC_DEFUN([XC_M4_TR_CPP_EX],
-[ifelse([$2], [],
-  [XC_M4_TR_CPP([$1])],
-  [patsubst(XC_QPATSUBST(XC_QTRANSLIT(XC_QPATSUBST(XC_QUOTE($1),
-                                                   [[$2]],
-                                                   [P]),
-                                      [abcdefghijklmnopqrstuvwxyz],
-                                      [ABCDEFGHIJKLMNOPQRSTUVWXYZ]),
-                         [[^A-Z0-9_]], [_]),
-            [\(_\(.*\)_\)], [\2])])])
-
-
-dnl XC_QUOTE (expression)
-dnl -------------------------------------------------
-dnl Expands to quoted result of 'expression' expansion.
-
-AC_DEFUN([XC_QUOTE],
-[[$@]])
-
-
-dnl XC_QPATSUBST (string, regexp[, repl])
-dnl -------------------------------------------------
-dnl Expands to quoted result of 'patsubst' expansion.
-
-AC_DEFUN([XC_QPATSUBST],
-[XC_QUOTE(patsubst([$1], [$2], [$3]))])
-
-
-dnl XC_QTRANSLIT (string, chars, repl)
-dnl -------------------------------------------------
-dnl Expands to quoted result of 'translit' expansion.
-
-AC_DEFUN([XC_QTRANSLIT],
-[XC_QUOTE(translit([$1], [$2], [$3]))])