Update docs, remove unused option, small cleanups

[nweires]

• Update outdated docs and comments
• Add an overview of the GCP architecture
• Remove some unused code
• Fix a couple small formatting issues

Tested: Did a small test run to check the code changes.

[github-actions]

File	Coverage
All files	86%	✅
base.py	91%	✅
exc.py	57%	✅
hpc.py	78%	✅
local.py	70%	✅
postprocessing.py	84%	✅
utils.py	91%	✅
cloud/docker_base.py	78%	✅
sampler/base.py	79%	✅
sampler/downselect.py	33%	✅
sampler/precomputed.py	93%	✅
sampler/residential_quota.py	61%	✅
test/shared_testing_stuff.py	85%	✅
test/test_docker.py	33%	✅
test/test_local.py	97%	✅
test/test_validation.py	97%	✅
workflow_generator/base.py	90%	✅
workflow_generator/commercial.py	53%	✅
workflow_generator/residential_hpxml.py	86%	✅

Minimum allowed coverage is 33%

Generated by 🐒 cobertura-action against f958eb7

[nweires]

I'm not sure what the right level of detail here is, but I felt we were missing a high-level outline of how we're using GCP (the kind that would have been useful when we were first trying to understand the AWS implementation).

[lathanh]

👍! I think you should add that many of these things are done by the base classes (including sampling, and input files).

I might suggest that a README.md would be better, especially since I think it'd be best to document more holistically (i.e., relationship with docker_base and aws), but I'm fine with this incremental improvement, at least.

[nweires]

Added a note that this logic is split between the two places.

Yeah, a readme might be better if we want to add more detail later. I'm thinking of this section as mainly "Here's how we're using GCP", which is pretty specific to gcp.py, but a more general "Here's how the code is structured" could also be helpful.

[lathanh]

👍! I think you should add that many of these things are done by the base classes (including sampling, and input files).

I might suggest that a README.md would be better, especially since I think it'd be best to document more holistically (i.e., relationship with docker_base and aws), but I'm fine with this incremental improvement, at least.