[Cleanup] - Remove redundant fields from SystemContextHandle

[ss-es]

What is this task and why do we need to work on it?

SystemContextHandle has some redundant fields that are already accessible in the handle.hotshot: SystemContext. We should remove these.

What work will need to be done to complete this task?

No response

Are there any other details to include?

No response

What are the acceptance criteria to close this issue?

Redundant fields are removed

Branch work will be merged to (if not the default branch)

No response