Remove unused and deprecated package `jest-environment-jsdom-sixteen`

[Fullchee]

Describe the feature you'd like:

• remove jest-environment-jsdom-sixteen package in devDependencies which isn't used
• https://github.com/SimenB/jest-environment-jsdom-sixteen
• 

Suggested implementation:

• remove the package from package.json

Describe alternatives you've considered:

• N/A

Teachability, Documentation, Adoption, Migration Strategy:

• since it's not used, it shouldn't change anything