Spatial_Engine: Remove unnecessary area methods

[FraserGreenroyd]

Fixes #2086

[FraserGreenroyd]

@BHoMBot check versioning
@BHoMBot check installer

[bhombot-ci]

@FraserGreenroyd to confirm, the following actions are now queued:

• check versioning
• check installer

There are 3 requests in the queue ahead of you.

[FraserGreenroyd]

@BHoMBot check compliance

[bhombot-ci]

@FraserGreenroyd to confirm, the following actions are now queued:

• check code-compliance
• check documentation-compliance
• check project-compliance
• check branch-compliance
• check dataset-compliance
• check copyright-compliance

There are 5 requests in the queue ahead of you.

[FraserGreenroyd]

@BHoMBot check core
@BHoMBot check null-handling
@BHoMBot check serialisation

[bhombot-ci]

@FraserGreenroyd to confirm, the following actions are now queued:

• check core
• check null-handling
• check serialisation

[Tom-Kingstone]

On code review, approving as this covers points set out in original issue(s).

[FraserGreenroyd]

@BHoMBot this is a DevOps instruction. I am requesting neutral checks on: unit-tests

[bhombot-ci]

@FraserGreenroyd I have provided neutral checks to the checks requested. These checks will need to be run properly to obtain full results.

[FraserGreenroyd]

@BHoMBot check ready-to-merge

[bhombot-ci]

@FraserGreenroyd to confirm, the following actions are now queued:

• check ready-to-merge