Remove unused filed

tools/spm_env.sh.in

-#
-#  @file spm_env.sh
-#
-#  @copyright 2016-2024 Bordeaux INP, CNRS (LaBRI UMR 5800), Inria,
-#                       Univ. Bordeaux. All rights reserved.
-#
-#  @version 1.2.4
-#  @author Mathieu Faverge
-#  @author Florent Pruvost
-#  @author Tony Delarue
-#  @date 2024-05-29
-#
-#!/bin/sh
-
-LIB=spm
-
-export SPM_ROOT=@CMAKE_INSTALL_PREFIX@
-
-for i in PATH DYLD_LIBRARY_PATH LD_LIBRARY_PATH LIBRARY_PATH LD_RUN_PATH INCLUDE INCLUDE_PATH PKG_CONFIG_PATH PYTHONPATH
-do
-
-  for j in /spm
-  do
-    cmd1="echo \\\"\$$i\\\" | sed -E 's+^(\(.*:|\))[^:]*${j}[^:]*(\(|:.*\))$+\1\2+' | sed 's/::/:/' | sed 's/^://' | sed 's/:$//' "
-    temp=`eval $cmd1`;
-    eval "$i=$temp";
-  done
-done
-
-export PATH=$PATH:$SPM_ROOT/bin
-export LD_RUN_PATH=$LD_RUN_PATH:$SPM_ROOT/lib
-export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$SPM_ROOT/lib
-export DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH:$SPM_ROOT/lib
-export LIBRARY_PATH=$LIBRARY_PATH:$SPM_ROOT/lib
-export PYTHONPATH=$PYTHONPATH:$SPM_ROOT/lib/python
-export INCLUDE=$INCLUDE:$SPM_ROOT/include
-export INCLUDE_PATH=$INCLUDE_PATH:$SPM_ROOT/include
-export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:$SPM_ROOT/lib/pkgconfig