[V1] Prompt logprobs + APC compatibility; prompt logprobs reqs cannot fill APC (#13949)

vllm/v1/engine/processor.py

@@ -72,12 +72,6 @@ class Processor:
                 f"Requested prompt logprobs of {params.prompt_logprobs}, "
                 f"which is greater than max allowed: {max_logprobs}")
 
-        # TODO(andy): enable this in follow up by recomputing.
-        if (params.prompt_logprobs is not None
-                and self.cache_config.enable_prefix_caching):
-            raise ValueError("Prefix caching with prompt logprobs not yet "
-                             "supported on VLLM V1.")
-
     def _validate_sampling_params(
         self,
         params: SamplingParams,