Remove unused imports

Author: Andrew Briand

vllm/model_executor/layers/quantization/utils/flashinfer_fp4_moe.py

@@ -361,8 +361,6 @@ def flashinfer_trtllm_fp4_routed_moe(
     """
     import flashinfer
 
-    from vllm.model_executor.models.llama4 import Llama4MoE
-
     # Quantize input to FP4
     a1_gscale = layer.w13_input_scale_quant
     (hidden_states_fp4, hidden_states_scale_linear_fp4) = flashinfer.fp4_quantize(