fix(scaffolder-backend): remove unused abort

Signed-off-by: mtt-artis <mtt-artis@gmail.com>

.changeset/cuddly-colts-dress.md

@@ -2,4 +2,4 @@
 '@backstage/plugin-scaffolder-backend': patch
 ---
 
-Simplify abort handling in debug:wait action
+Remove unused abort controller in debug:wait action

plugins/scaffolder-backend/src/scaffolder/actions/builtin/debug/wait.ts

@@ -84,13 +84,14 @@ export function createWaitAction(options?: {
         );
       }
 
-      await new Promise(resolve => {
+      await new Promise<void>(resolve => {
         const timeoutHandle = setTimeout(abort, delayTime.toMillis());
-        ctx.signal?.addEventListener('abort', abort, { once: true });
+        ctx.signal?.addEventListener('abort', abort);
 
         function abort() {
+          ctx.signal?.removeEventListener('abort', abort);
           clearTimeout(timeoutHandle);
-          resolve('finished');
+          resolve();
         }
       });
     },