clean unnecessary CMAKE_ARGS="-DEXECUTORCH_BUILD_CUDA=ON"

[Gasoonjia]

Summary: we no longer need this arg for et installation. clean it to avoid misleading.

Differential Revision: D85223111

[pytorch-bot]

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/15350

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❌ 7 New Failures, 2 Unrelated Failures

As of commit 19cb052 with merge base 81a3acc ():

NEW FAILURES - The following jobs have failed:

• pull / test-samsung-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 03ef88b1edad9f70633949bcf3c07fc49bd990d1947c8b1f2ab2a7b6c5bef5ab /exec failed with exit code 1
• pull / unittest-nxp-neutron / linux-job (gh)
  RuntimeError: Command docker exec -t b86b67291353925154e0b78facf643d4c5fca8fc8755827b61a796dcf6cfa998 /exec failed with exit code 1
• Test CUDA Builds / export-gemma3-cuda-non-quantized / linux-job (gh)
  RuntimeError: Command docker exec -t bf61ea272de605a2cadde375d7c5023b693d7fd3b5d3ede2dd90e3ab95dad415 /exec failed with exit code 2
• Test CUDA Builds / export-voxtral-cuda-non-quantized / linux-job (gh)
  RuntimeError: Command docker exec -t 55fd1146377cf8b82cc0ed441726ca2ba8dec8d1c2168878d0e6fe05be40c5bb /exec failed with exit code 2
• Test CUDA Builds / export-voxtral-cuda-quantized-int4-tile-packed / linux-job (gh)
  RuntimeError: Command docker exec -t 38a84dfde648be99bd7267bb5d02a3eabe4e5809583022c7abf736e810d4a6c7 /exec failed with exit code 2
• Test CUDA Builds / export-voxtral-cuda-quantized-int4-weight-only / linux-job (gh)
  RuntimeError: Command docker exec -t f124325bc9e2448a471b7ff6b0e5fbd4b299bfd8734fb7d7ae7a09f2ad054d86 /exec failed with exit code 2
• Test Metal Backend / export-voxtral-metal-artifact / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 2

BROKEN TRUNK - The following jobs failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / unittest / linux / linux-job (gh) (trunk failure)
• pull / unittest-editable / linux / linux-job (gh) (trunk failure)

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[meta-codesync]

@Gasoonjia has exported this pull request. If you are a Meta employee, you can view the originating Diff in D85223111.

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[larryliu0820]

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