🐛 Bug

The submodule docs/src/pytorch-sphinx-theme seems to be broken.
This prevents the following command from working:

$ kubectl kustomize https://github.com/pytorch/elastic.git/kubernetes/config/default?ref=v0.2.2

(workaround is to clone the repo first, but the former is more convenient).

Component (check all that applies):

• state api
• train_step api
• train_loop
• rendezvous
• checkpoint
• rollback
• metrics
• petctl
• examples
• docker
• other

To Reproduce

Steps to reproduce the behavior:

$ git clone https://github.com/pytorch/elastic.git
$ cd elastic
$ git submodule update --init --recursive
fatal: No url found for submodule path 'docs/src/pytorch-sphinx-theme' in .gitmodules

Expected behavior

The submodule update should exit successfully (doesn't matter to me if the submodule is kept or not).

Environment

• torchelastic version (e.g. 0.1.0rc1): current master (0293cea)
• OS (e.g., Linux): Ubuntu
• How you installed torchelastic (conda, pip, source, docker): N/A
• Docker image and tag (if using docker): N/A
• Build command you used (if compiling from source): N/A
• Git commit (if installed from source): 0293cea
• Python version: N/A
• CUDA/cuDNN version: N/A
• GPU models and configuration: N/A
• Execution environment (on-prem, aws, etc): on-prem
• Any other relevant information: kubectl version is 1.21.2, git version is 2.25.1