Remove unused globals from libcamera example

[Sean-Kenneth-Doherty]

Summary

• Remove two unused globals from Example Scripts/libcamera.ks.
• Avoid evaluating the undefined pi name during library initialization.

Fixes #2.

Validation

• git diff --check
• rg -n "libcamera_doGeo|libcamera_degToRad|\bpi\b" "Example Scripts/libcamera.ks" returned no matches.
• Build was attempted, but this checkout has no configured KSP game instance, so CKAN stopped before compile.

[Sean-Kenneth-Doherty]

Closing this under my tightened quality bar rather than leaving an unproven kOS example-script draft in your queue. The branch fixes a plausible undefined-global startup path with targeted static checks, but the build did not complete locally and the script was not runtime-tested in KSP/kOS. I will not reopen unless you want this exact fix or there is a concrete user-facing defect with proof.