Remove bounds check

Author: sjmonson

src/guidellm/scheduler/worker.py

@@ -225,11 +225,6 @@ def process_loop_asynchronous(
     ):
         async def _process_runner():
             if max_concurrency is not None:
-                if max_concurrency < 1:
-                    raise ValueError(
-                        f"max_concurrency must be greater than 0, got {max_concurrency}"
-                    )
-
                 pending = asyncio.Semaphore(max_concurrency)
             else:
                 pending = None