Remove unused Emitter2.jl file

[BrianGun]

Pull Request Template

Description

Emitter2.jl is old code not used anywhere. Removing it from the project.

Fixes # (issue)

Type of change

• 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 not work as expected)
• This change requires a documentation update

How Has This Been Tested?

No tests required since the code is unused.

• Test A
• Test B

Test Configuration(s):

• Firmware version:
• Hardware:
• Toolchain:
• SDK:

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

[alfredclwong]

I'm already addressing this in PR #83, commit abdd925. There's also an include statement in Optical.jl that needs to be removed. Probably not worth making another PR just for this.