chore: remove redundant __import__

[jxdv]

Description

There's no need to use import('os').name as we already have imported os - therefore we can just use os.name

Motivation and Context

Less cluttered code + better readability.

How Has This Been Tested?

Ran gX as CLI + Web UI.

Screenshots (if appropriate):

n/a

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[jxdv]

I'll create 1 more PR to fix bug when passing invalid addr:port to --web arg after this PR and #176 is merged.

[orhun]

Fair enough 👍🏼