[MISC] Remove FP8 warning (vllm-project#5472)

Co-authored-by: Philipp Moritz <pcmoritz@gmail.com>

vllm/config.py

@@ -244,7 +244,7 @@ def _verify_quantization(self) -> None:
                     f"{self.quantization} quantization is currently not "
                     f"supported in ROCm.")
             if (self.quantization
-                    not in ["marlin", "gptq_marlin_24", "gptq_marlin"]):
+                    not in ("fp8", "marlin", "gptq_marlin_24", "gptq_marlin")):
                 logger.warning(
                     "%s quantization is not fully "
                     "optimized yet. The speed can be slower than "