🩹 [Patch]: Remove status function for Australia region (migrated to new reporting type)

[MariusStorhaug]

Describe the change

The current status-related functions for Australia are now obsolete and should be removed, as the region has migrated to a new type of issue reporting. The following functions are affected:

• Get-GitHubScheduledMaintenance (Australia)
• Get-GitHubStatus (Australia)
• Get-GitHubStatusComponent (Australia)
• Get-GitHubStatusIncident (Australia)

For example, these errors are observed:

Error: [-] Get-GitHubScheduledMaintenance - Gets scheduled maintenance for Australia 244ms (243ms|1ms)
Error: [-] Get-GitHubScheduledMaintenance - Gets active maintenance for Australia 134ms (133ms|1ms)
Error: [-] Get-GitHubScheduledMaintenance - Gets upcoming maintenance for Australia 182ms (182ms|0ms)
Error: [-] Get-GitHubStatus - Gets all status for Australia 121ms (120ms|0ms)
Error: [-] Get-GitHubStatus - Gets summary status for Australia 156ms (156ms|0ms)
Error: [-] Get-GitHubStatusComponent - Gets the status of GitHub components for Australia 158ms (157ms|0ms)
Error: [-] Get-GitHubStatusIncident - Gets the status of all GitHub incidents for Australia 180ms (180ms|0ms)
Error: [-] Get-GitHubStatusIncident - Gets the status of unresolved GitHub incidents for Australia 188ms (187ms|1ms)

These should be removed to prevent confusion and maintenance overhead. Update all documentation accordingly and ensure that API surfaces and calls related to the "Australia" status functions are deprecated or removed.