Do not display where an executable is located

Use only the exit status of the function mywhich to determine which
command should be used to remove sysvinit script.

Signed-off-by: Matt Darfeuille <matdarf@gmail.com>
Signed-off-by: Tom Eastep <teastep@shorewall.net>

Shorewall-core/lib.installer

@@ -51,7 +51,6 @@ mywhich() {
 
     for dir in $(split $PATH); do
 	if [ -x $dir/$1 ]; then
-	    echo $dir/$1
 	    return 0
 	fi
     done

Shorewall-core/lib.uninstaller

@@ -51,7 +51,6 @@ mywhich() {
 
     for dir in $(split $PATH); do
 	if [ -x $dir/$1 ]; then
-	    echo $dir/$1
 	    return 0
 	fi
     done