[Attention] Remove imports from vllm/attention/__init__.py (#29342)

Signed-off-by: Matthew Bonanni <mbonanni@redhat.com>

vllm/compilation/fusion_attn.py

@@ -10,7 +10,7 @@ from torch import fx
 from torch._higher_order_ops.auto_functionalize import auto_functionalized
 from torch._inductor.pattern_matcher import PatternMatcherPass
 
-from vllm.attention import Attention
+from vllm.attention.layer import Attention
 from vllm.config import VllmConfig, get_layers_from_vllm_config
 from vllm.logger import init_logger
 from vllm.model_executor.layers.quantization.utils.quant_utils import (

vllm/compilation/qk_norm_rope_fusion.py

@@ -9,7 +9,7 @@ from torch import fx
 from torch._higher_order_ops.auto_functionalize import auto_functionalized
 from torch._inductor.pattern_matcher import PatternMatcherPass
 
-from vllm.attention import Attention
+from vllm.attention.layer import Attention
 from vllm.config import VllmConfig, get_layers_from_vllm_config
 from vllm.logger import init_logger
 from vllm.model_executor.layers.rotary_embedding import RotaryEmbedding