Merge pull request #23270 from rosswhitfield/rpm_postun_$1

Change the check for rpm uninstall/upgrade to use $1

buildconfig/CMake/Packaging/rpm/scripts/rpm_post_uninstall.sh.in

@@ -8,9 +8,8 @@
 ENVVARS_ON_INSTALL=@ENVVARS_ON_INSTALL_INT@
 
 # Remove exe and links only if it looks like we were removed
-# and not upgraded. If launch_mantidplot.sh exists then package
-# has been upgraded and MantidPlot_exe replaced so don't touch anything
-if [ ! -e $RPM_INSTALL_PREFIX0/@BIN_DIR@/launch_mantidplot.sh ]; then
+# and not upgraded. If $1 == 0 then it's uninstall not upgrade
+if [ $1 -eq 0 ]; then
     if [ -e $RPM_INSTALL_PREFIX0/@BIN_DIR@/MantidPlot_exe ]; then
         rm $RPM_INSTALL_PREFIX0/@BIN_DIR@/MantidPlot_exe
     fi