[core] clean up executor class hierarchy between v1 and v0 (#12171)

Signed-off-by: youkaichao <youkaichao@gmail.com>

vllm/executor/executor_base.py

@@ -79,16 +79,6 @@ class ExecutorBase(ABC):
         b = min([r[1] for r in results])
         return a, b
 
-    def initialize(self, num_gpu_blocks: int) -> None:
-        """
-        Initialize the KV caches and begin the model execution loop of the
-        underlying workers.
-        For V1 compatibility.
-        """
-        logger.info("# GPU blocks: %d", num_gpu_blocks)
-        self.collective_rpc("initialize_cache", args=(num_gpu_blocks, ))
-        self.collective_rpc("compile_or_warm_up_model")
-
     def initialize_cache(self, num_gpu_blocks: int, num_cpu_blocks) -> None:
         """Initialize the KV cache by invoking the underlying worker.
         """