Update et-pin.txt to get rid of torch dependency #1427

Job	Run time
torchchat-command-load-test (macos-14)	2m 50s
gather-models-cpu	14s
test-tinystories-executorch (16-core-ubuntu)	18m 23s
test-tinystories-executorch (macos-14-xlarge)	14m 2s
compile-gguf (macos-14)	5m 55s
gather-models-gpu	14s
runner-aoti (16-core-ubuntu)	7m 45s
runner-aoti (macos-14-xlarge)	4m 27s
runner-et (16-core-ubuntu)	13m 15s
runner-et (macos-14-xlarge)	11m 52s
test-gguf-util (macos-14)	11m 24s
test-build-runner-et-android / linux-job	12m 57s
test-mps / macos-job	1m 24s
test-mps-dtype / macos-job	1m 55s
test-cpu-aoti (x86_64, stories15M)	21m 22s
test-cpu-eval-sanity-check (x86_64, stories15M)	9m 32s
test-cpu-aoti (aarch64, stories15M)	9m 16s
test-cpu-compile (x86_64, stories15M)	12m 8s
test-cpu-eval-sanity-check-float16 (x86_64, stories15M)	19m 47s
test-cpu-eval-sanity-check (aarch64, stories15M)	29m 58s
test-cpu-compile (aarch64, stories15M)	7m 47s
test-cpu-eval-sanity-check-float16 (aarch64, stories15M)	5m 27s
test-cpu-eval-sanity-check-float32 (x86_64, stories15M)	26m 49s
test-cpu-eval-sanity-check-float32 (aarch64, stories15M)	28m 1s
test-gpu-aoti-bfloat16 (cuda, stories15M) / linux-job	14m 4s
test-gpu-aoti-float32 (cuda, stories15M) / linux-job	15m 23s
test-gpu-aoti-float16 (cuda, stories15M) / linux-job	13m 55s
test-gpu-compile (cuda, stories15M) / linux-job	20m 5s
test-gpu-eval-sanity-check (cuda, stories15M) / linux-job	13m 43s
	5h 53m 54s

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