Updated vllm imports in vllm_causallms.py (#1890)

* Reorder vllm imports in vllm_causallms.py

* Update vllm_causallms.py

lm_eval/models/vllm_causallms.py

@@ -21,9 +21,7 @@
 try:
     import ray
     from vllm import LLM, SamplingParams
-
-    if parse_version(version("vllm")) > parse_version("0.3.0"):
-        from vllm.lora.request import LoRARequest
+    from vllm.lora.request import LoRARequest
     from vllm.transformers_utils.tokenizer import get_tokenizer
 except ModuleNotFoundError:
     pass