sync with Debian

debian/linux-perf.postrm

@@ -9,8 +9,7 @@ if [ -n "${old_version_suffix}" ] ; then
 fi
 unset old_version_suffix
 
-case "$1" in
-remove )
+if [ "$1" = remove ] ; then
     for wrapper in \
       /usr/bin/perf \
       /usr/share/bash-completion/completions/perf \
@@ -19,7 +18,6 @@ remove )
         diversion="${wrapper%/perf*}/perf.wrapper${wrapper#*/perf}"
         dpkg-divert --package linux-perf --divert "${diversion}" --rename --remove "${wrapper}"
     done ; unset wrapper diversion
-;;
-esac
+fi
 
 #DEBHELPER#