test: remove unused parameter

PR-URL: #17193
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Alexey Orlenko <eaglexrlnk@gmail.com>

test/sequential/test-inspector-stops-no-file.js

@@ -7,7 +7,7 @@ const child = spawn(process.execPath,
                     [ '--inspect', 'no-such-script.js' ],
                     { 'stdio': 'inherit' });
 
-function signalHandler(value) {
+function signalHandler() {
   child.kill();
   process.exit(1);
 }