Remove invalid unit test dataset

[FraserGreenroyd]

Fixes #3057

[FraserGreenroyd]

@BHoMBot check unit-tests

[bhombot-ci]

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

• check unit-tests

[FraserGreenroyd]

@BHoMBot check unit-tests

[bhombot-ci]

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

• check unit-tests

[FraserGreenroyd]

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

[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
• check core
• check serialisation
• check null-handling
• check versioning

[FraserGreenroyd]

@BHoMBot this is a DevOps instruction. I am requesting neutral checks on: installer, dataset-compliance, ready-to-merge

[bhombot-ci]

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

[CKBoulter]

Dataset removed as required/explained by @FraserGreenroyd