Remove now unused magick_check_pthread_lib.m4
Now that configure.ac is reorganized magick_check_pthread_lib.m4 is unused. Remove it.
diff --git a/m4/magick_check_pthread_lib.m4 b/m4/magick_check_pthread_lib.m4
deleted file mode 100644
index 817f8ba..0000000
--- a/m4/magick_check_pthread_lib.m4
+++ /dev/null
@@ -1,75 +0,0 @@
-# SYNOPSIS
-#
-# MAGICK_CHECK_PTHREAD_LIB(LIBRARY,
-# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
-#
-# DESCRIPTION
-#
-# Macro to test for pthread library
-# Written by Bob Friesenhahn based on test in ACX_PTHREAD
-#
-# LICENSE
-#
-# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
-#
-# 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, either version 3 of the License, or (at your
-# option) any later version.
-#
-# This program 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 General
-# Public License for more details.
-#
-# You should have received a copy of the GNU General Public License along
-# with this program. If not, see <http://www.gnu.org/licenses/>.
-#
-# As a special exception, the respective Autoconf Macro's copyright owner
-# gives unlimited permission to copy, distribute and modify the configure
-# scripts that are the output of Autoconf when processing the Macro. You
-# need not follow the terms of the GNU General Public License when using
-# or distributing such scripts, even though portions of the text of the
-# Macro appear in them. The GNU General Public License (GPL) does govern
-# all other use of the material that constitutes the Autoconf Macro.
-#
-# This special exception to the GPL applies to versions of the Autoconf
-# Macro released by the Autoconf Archive. When you make and distribute a
-# modified version of the Autoconf Macro, you may extend this special
-# exception to the GPL to apply to your modified version as well.
-
-AC_DEFUN([MAGICK_CHECK_PTHREAD_LIB], [
-AC_REQUIRE([AC_CANONICAL_HOST])
-AC_LANG_SAVE
-AC_LANG_C
-magick_pthread_lib_ok=no
-
-LIB=-l$1
-save_LIBS="$LIBS"
-LIBS="$LIBS $LIB"
-
-AC_MSG_CHECKING([for the pthreads library $LIB])
-AC_TRY_LINK([#include <pthread.h>],
- [ pthread_t th;
- pthread_join(th, 0);
- pthread_attr_init(0);
- pthread_cleanup_push(0, 0);
- pthread_create(0,0,0,0);
- pthread_cleanup_pop(0); ],
- [magick_pthread_lib_ok=yes])
-
-AC_MSG_RESULT(${magick_pthread_lib_ok})
-if test "$magick_pthread_lib_ok" = yes
-then
- $2
- :
-else
- $3
- :
-fi
-
-LIBS="$save_LIBS"
-
-AC_LANG_RESTORE
-])dnl MAGICK_CHECK_PTHREAD_LIB
-