Remove apparently-unused import torchvision in model.py #1858

Job	Run time
test-readme-any / linux-job	7m 11s
test-readme-cpu / linux-job	7m 9s
test-advanced-any / linux-job	15m 0s
test-advanced-cpu / linux-job	15m 1s
test-evaluation-any / linux-job	4m 2s
test-evaluation-cpu / linux-job	4m 3s
test-gguf-any / linux-job	15m 0s
test-gguf-cpu / linux-job	14m 56s
test-quantization-any / linux-job	15m 13s
test-quantization-cpu / linux-job	15m 15s
	1h 52m 50s

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