Fix docs not showing error, remove circleci docs scripts

[clee2000]

Docs were not exiting with failure, for example https://github.com/pytorch/pytorch/actions/runs/5604612586/job/15184094038#step:9:1131 because the if statement returned 0 if we want to exit.

Also get rid of the circleci scripts since they aren't used anywhere.

Example error:

copying static files... done
copying extra files... done
dumping search index in English (code: en)... done
dumping object inventory... done
build finished with problems, 1 warning.
make: *** [Makefile:49: html] Error 1
+ code=2
+ '[' 2 -ne 0 ']'
+ set +x
=========================
/opt/conda/envs/py_3.8/lib/python3.8/site-packages/torch/nn/parallel/comm.py:docstring of torch.nn.parallel.comm.scatter:1: WARNING: more than one target found for cross-reference 'Stream': torch.cuda.Stream, torch.cuda.streams.Stream, torch.cpu.Stream
=========================
Docs build failed. If the failure is not clear, scan back in the log
for any WARNINGS or for the line build finished with problems
(tried to echo the WARNINGS above the ==== line)
=========================
+ return 2
+ exit 0

[pytorch-bot]

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/105678

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⏳ 1 Pending, 2 Unrelated Failures

As of commit 300764b:

UNSTABLE - The following jobs failed but were likely due to flakiness present on trunk and has been marked as unstable:

• linux-bionic-cuda11.8-py3.10-gcc9 / test (distributed, 3, 3, linux.8xlarge.nvidia.gpu, unstable) (gh)
• linux-focal-py3.8-gcc7 / test (distributed, 1, 2, linux.2xlarge, unstable) (gh)

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[clee2000]

@pytorchbot merge -f "only changes were docs workflow related and docs workflow is succeeding"

[pytorchmergebot]

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