fix: vars

Author: jhefferman-sfdc

test/commands/lightning/dev/helpers/processUtils.ts

@@ -15,18 +15,17 @@
  */
 
 import { type ChildProcess } from 'node:child_process';
-import treeKill from 'tree-kill';
 
 /**
  * Clean up a server process and all its child processes. Uses tree-kill so
  * descendant node processes (e.g. LWR workers) are terminated.
  */
-export function killServerProcess(serverProcess: ChildProcess | null | undefined): void {
-  if (!serverProcess?.pid) return;
-  const pid = serverProcess.pid;
+export function killServerProcess(serverProcess: ChildProcess | undefined): void {
+  // Clean up
   try {
-    // eslint-disable-next-line @typescript-eslint/no-unsafe-call
-    treeKill(pid, 'SIGKILL');
+    if (serverProcess?.pid && process.kill(serverProcess.pid, 0)) {
+      process.kill(serverProcess.pid, 'SIGKILL');
+    }
   } catch (error) {
     const err = error as NodeJS.ErrnoException;
     if (err.code !== 'ESRCH') throw error;