Revert "Add missing Buck build targets and module exports for the cortex_m quantizer package"

[zingo]

Reverts #16370

cc @freddan80 @per @oscarandersson8218 @digantdesai

[pytorch-bot]

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16372

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❌ 9 New Failures, 2 Cancelled Jobs, 1 Pending, 13 Unrelated Failures

As of commit a4fe505 with merge base 39203cf ():

NEW FAILURES - The following jobs have failed:

• pull / test-multimodal-linux (gemma3-4b) / linux-job (gh)
  RuntimeError: Command docker exec -t bcd8bdd5952a2a213713cf977fb6ddb75b2ab439c55602d1f70a058d9521cb6b /exec failed with exit code 139
• Test CUDA Builds / test-model-cuda-e2e (mistralai, Voxtral-Mini-3B-2507, quantized-int4-tile-packed) / linux-job (gh)
  RuntimeError: Command docker exec -t 6748c248a2b0a7f00943094078af4c4d54a008232bbffff554b0b56592ac9dcc /exec failed with exit code 1
• Test CUDA Builds / test-model-cuda-e2e (openai, whisper-small, quantized-int4-weight-only) / linux-job (gh)
  RuntimeError: Command docker exec -t 0457e71f4dffdccfbbccbc81a94cce9936125feb2229edbfba887b118a1b0534 /exec failed with exit code 1
• Test Metal Backend / export-model-metal-artifact (openai, whisper-large-v3-turbo, non-quantized) / macos-job (gh)
  No files were found with the provided path: /Users/ec2-user/runner/_work/_temp/artifacts/. No artifacts will be uploaded.
• trunk / test-arm-backend-vkml (test_pytest_ops_vkml) / linux-job (gh)
  RuntimeError: Command docker exec -t dc1b1b028227408ec5336e3d6302b5bc6f5859b7506a637999b87e36df35c7fb /exec failed with exit code 1
• trunk / test-mcu-cortex-m-backend / linux-job (gh)
  RuntimeError: Command docker exec -t 593a3f172001b3329ee23a615ccd6e2d2d5119987f8fbf5cb2cc930061d26087 /exec failed with exit code 1
• trunk / test-models-macos-cpu (emformer_join, xnnpack-quantization-delegation) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 128
• trunk / test-models-macos-mps / macos-job (gh)
  The process '/usr/bin/git' failed with exit code 128
• trunk / test-models-windows (vit, xnnpack-q8) / windows-job (gh)
  The process 'C:\Program Files\Git\cmd\git.exe' failed with exit code 128

CANCELLED JOBS - The following jobs were cancelled. Please retry:

• pull / unittest-editable / linux / linux-job (gh)
  ##[error]The operation was canceled.
• trunk / test-selective-build-macos (cmake) / macos-job (gh)
  ##[error]The operation was canceled.

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• pull / test-binary-size-linux-gcc / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Test CUDA Builds / test-model-cuda-e2e (openai, whisper-large-v3-turbo, non-quantized) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Test CUDA Builds / test-model-cuda-e2e (openai, whisper-large-v3-turbo, quantized-int4-weight-only) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• Test CUDA Builds / test-models-cuda (conv1d) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• trunk / test-arm-backend (test_pytest_models_ethosu_fvp) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• trunk / test-arm-backend (test_pytest_ops_ethosu_fvp) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• trunk / test-huggingface-transformers-xnnpack (qwen3-0.6b|xnnpack|--quantize) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• trunk / test-llama-runner-linux (fp32, portable, linux.arm64.2xlarge, executorch-ubuntu-22.04-gcc11-aarch64) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• trunk / test-models-linux-aarch64 (add, xnnpack-quantization-delegation, linux.arm64.2xlarge) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• trunk / test-models-linux-aarch64 (vit, xnnpack-quantization-delegation, linux.arm64.2xlarge) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• trunk / test-qnn-model (fp32, ic4) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• trunk / test-torchao-huggingface-checkpoints (qwen3_4b, linux.2xlarge, executorch-ubuntu-22.04-clang12, x... / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128

UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:

• pull / android / run-emulator (gh) (#16137)
  Timeout waiting for emulator to boot.

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[psiddh]

I am trying a fwd fix. will shortly post the PR here

#16376 (Checking if this fixes the issues)