test: removed unused variable

Removed an unused variable in test-buffer-failed-alloc-typed-arrays.js.

PR-URL: #23481
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

test/parallel/test-buffer-failed-alloc-typed-arrays.js

@@ -26,7 +26,7 @@ for (const allocator of allocators) {
       // These allocations are known to fail. If they do,
       // Uint32Array should still produce a zeroed out result.
       allocator(size);
-    } catch (e) {
+    } catch {
       assert.deepStrictEqual(new Uint32Array(10), zeroArray);
     }
   }