test: remove test-node-output-v8-warning

asm.js validation is deprecated and disabled by default in V8,
so there's no longer a stable user-reachable trigger for
`v8::Isolate::kMessageWarning`. Remove the test.

Refs: https://chromium-review.googlesource.com/c/v8/v8/+/7832184

Signed-off-by: Joyee Cheung <joyeec9h3@gmail.com>
PR-URL: nodejs#63469
Fixes: nodejs/node-v8#310
Refs: https://issues.chromium.org/issues/510487707
Refs: nodejs#24365
Refs: https://chromium-review.googlesource.com/c/v8/v8/+/7832184
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Richard Lau <richard.lau@ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>

Author: joyeecheung