Arm backend: Remove submodule serialization_lib

[zingo]

Remove the git submodule serialization_lib since its pointing to an old 0.80 tag and is not used by the arm backend.

Instead this library is now cloned part of the tosa-reference-module when needed.

Change-Id: I34a3707b35cab6413e8aa5365fc41d404b4eb9fa
Signed-off-by: [email protected]

cc @digantdesai @freddan80 @per @zingo @oscarandersson8218

[pytorch-bot]

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❌ 4 New Failures, 4 Unrelated Failures

As of commit 0b988ad with merge base 4a7e2ac ():

NEW FAILURES - The following jobs have failed:

• pull / test-llava-runner-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 4e7f8b264260f9364f4a52a98031f372cf10cad5589d2bba61e01c0983626d35 /exec failed with exit code 139
• pull / test-moshi-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 6b01fcf44e8572c5a37791e4613daa2053c8de253c006345c8e9938b7722350d /exec failed with exit code 1
• trunk / test-llama-runner-mac (fp32, coreml) / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1
• trunk / test-models-arm-zephyr (add) / linux-job (gh)
  RuntimeError: Command docker exec -t f120777e3b4b01391cf6dcdef7455b329dddc0f6610f204193987529b7ca568d /exec failed with exit code 1

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

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

• pull / test-openvino-linux / linux-job (gh) (trunk failure)
  AttributeError: '_OpNamespace' 'quantized_decomposed' object has no attribute 'convert_element_type'
• pull / unittest / linux / linux-job (gh) (trunk failure)
  /pytorch/executorch/backends/vulkan/runtime/graph/ops/impl/Reduce.cpp:41:26: error: 'get_tensor' is a protected member of 'vkcompute::ComputeGraph'
• pull / unittest-editable / linux / linux-job (gh) (trunk failure)
  /pytorch/executorch/backends/vulkan/runtime/graph/ops/impl/Reduce.cpp:41:26: error: 'get_tensor' is a protected member of 'vkcompute::ComputeGraph'
• trunk / unittest-release / linux / linux-job (gh) (trunk failure)
  /pytorch/executorch/backends/vulkan/runtime/graph/ops/impl/Reduce.cpp:41:26: error: 'get_tensor' is a protected member of 'vkcompute::ComputeGraph'

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[zingo]

@digantdesai maybe you want to check this out?