[quant][fx] Remove additional_object_mapping from the docs

[jerryzh168]

Stack from ghstack (oldest at bottom):

• [quant][fx] Cleanup some unused states and args #75521
• [quant][fx] Use native backend_config_dict in convert #75520
• [quant][fx] Using native backend_config_dict in prepare #75469
• -> [quant][fx] Remove additional_object_mapping from the docs #75389

Summary:
This seems to be removed before, so won't mark this PR as bc-breaking, this use case
is now enabled with backend_config_dict api

Test Plan:
python test/test_quantization.py TestQuantizeFx
python test/test_quantization.py TestQuantizeFxOps

Reviewers:

Subscribers:

Tasks:

Tags:

Differential Revision: D35451960

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💊 CI failures summary and remediations

As of commit e304407 (more details on the Dr. CI page):

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• 1/1 failures introduced in this PR

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🕵️ 1 new failure recognized by patterns

The following CI failures do not appear to be due to upstream breakages

pull / pytorch-xla-linux-bionic-py3.7-clang8 / test (xla, 1, 1, linux.2xlarge) (1/1)

Step: "Test" (full log | diagnosis details | 🔁 rerun)

2022-04-11T06:36:16.3241597Z RuntimeError: tens...OK() (UNKNOWN: Could not start gRPC server vs. OK)

2022-04-11T06:36:16.3234594Z   File "/opt/conda/lib/python3.7/site-packages/torch_xla-1.12-py3.7-linux-x86_64.egg/torch_xla/distributed/xla_multiprocessing.py", line 315, in _setup_replication
2022-04-11T06:36:16.3235150Z     device = xm.xla_device()
2022-04-11T06:36:16.3235652Z   File "/opt/conda/lib/python3.7/site-packages/torch_xla-1.12-py3.7-linux-x86_64.egg/torch_xla/core/xla_model.py", line 232, in xla_device
2022-04-11T06:36:16.3237154Z     devkind=devkind if devkind is not None else None)
2022-04-11T06:36:16.3238199Z   File "/opt/conda/lib/python3.7/site-packages/torch_xla-1.12-py3.7-linux-x86_64.egg/torch_xla/core/xla_model.py", line 137, in get_xla_supported_devices
2022-04-11T06:36:16.3238842Z     xla_devices = _DEVICES.value
2022-04-11T06:36:16.3239319Z   File "/opt/conda/lib/python3.7/site-packages/torch_xla-1.12-py3.7-linux-x86_64.egg/torch_xla/utils/utils.py", line 32, in value
2022-04-11T06:36:16.3239739Z     self._value = self._gen_fn()
2022-04-11T06:36:16.3240372Z   File "/opt/conda/lib/python3.7/site-packages/torch_xla-1.12-py3.7-linux-x86_64.egg/torch_xla/core/xla_model.py", line 19, in <lambda>
2022-04-11T06:36:16.3240926Z     _DEVICES = xu.LazyProperty(lambda: torch_xla._XLAC._xla_get_devices())
2022-04-11T06:36:16.3241597Z RuntimeError: tensorflow/compiler/xla/xla_client/xrt_local_service.cc:56 : Check failed: tensorflow::NewServer(server_def, &server_) == ::tensorflow::Status::OK() (UNKNOWN: Could not start gRPC server vs. OK)
2022-04-11T06:36:16.3247199Z xla:0 is not a TPU or GPU device
2022-04-11T06:36:16.5294248Z Traceback (most recent call last):
2022-04-11T06:36:16.5294839Z   File "/var/lib/jenkins/workspace/xla/test/test_mp_all_gather.py", line 49, in <module>
2022-04-11T06:36:16.5295311Z     xmp.spawn(_mp_fn, args=())
2022-04-11T06:36:16.5295869Z   File "/opt/conda/lib/python3.7/site-packages/torch_xla-1.12-py3.7-linux-x86_64.egg/torch_xla/distributed/xla_multiprocessing.py", line 395, in spawn
2022-04-11T06:36:16.5296197Z     start_method=start_method)
2022-04-11T06:36:16.5296578Z   File "/opt/conda/lib/python3.7/site-packages/torch/multiprocessing/spawn.py", line 198, in start_processes
2022-04-11T06:36:16.5296849Z     while not context.join():
2022-04-11T06:36:16.5297205Z   File "/opt/conda/lib/python3.7/site-packages/torch/multiprocessing/spawn.py", line 154, in join
2022-04-11T06:36:16.5297469Z     exit_code=exitcode

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[jerryzh168]

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[vkuzo]

maybe we can update the PR title too?

[jerryzh168]

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[jerryzh168]

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[jerryzh168]

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