[Core] Remove the legacy Ray compiled-graph executor (#61712)

Signed-off-by: Woosuk Kwon <woosuk@inferact.ai>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

tools/pre_commit/check_forbidden_imports.py

@@ -73,7 +73,6 @@ CHECK_IMPORTS = {
             "benchmarks/fused_kernels/layernorm_rms_benchmarks.py",
             # cloudpickle
             "vllm/v1/executor/multiproc_executor.py",
-            "vllm/v1/executor/ray_executor.py",
             "vllm/entrypoints/llm.py",
             "tests/utils.py",
             # pickle and cloudpickle