Update mock

[ilkaynazli]

for compatibly to python 3.11, we either needed to remove mock in favor of the unittest.mock, or update current mock version.
I decided to remove it since python 2.7 is deprecated and unittest.mock is native to python 3+

I also removed references to six

[ilkaynazli]

@jdavisp3 it looks like the previous build failed due to python 3.9. How can we resolve this issue?

[ilkaynazli]

Tests pass locally

[jdavisp3]

@ilkaynazli which build? can you link to it?

[ilkaynazli]

@jdavisp3 I think this one https://go-cd.counsyl.com/go/pipelines#!/baya

[jdavisp3]

@ilkaynazli ah, hrm, yes. I think that is going to be tricky to get the go-cd pipeline to work. I think we'd want to switch to the newer github actions pipelines for python libs. But to do that we might need to fork this repo to the myriadgenetics org and work on it from there.

[ilkaynazli]

is that something I can do? Are there any examples on it? Also can I get a code review on this pr, please? @jdavisp3

[jdavisp3]

is that something I can do? Are there any examples on it? Also can I get a code review on this pr, please? @jdavisp3

Create a repo named baya in the other org and add it as a remote to your local repo and then push the main branch up there.