Update uninstall script to be more correct

[sptramer]

No description provided.

[ghost]

Docs Build status updates of commit f261146:

🕙 Full build: the average full build time is 25 min(s) 32 sec(s), this is based on the last 125 build(s) for this repository.

[ghost]

Docs Build status updates of commit f261146:

✅ Validation status: passed

File	Status	Preview URL	Details
docs-conceptual/azps-1.8.0/uninstall-az-ps.md	✅Succeeded	View (azps-1.8.0)
docs-conceptual/azps-2.2.0/uninstall-az-ps.md	✅Succeeded	View (azps-2.2.0)
docs-conceptual/azurermps-5.7.0/uninstall-azurerm-ps.md	✅Succeeded	View (azurermps-5.7.0)
docs-conceptual/azurermps-6.13.0/uninstall-azurerm-ps.md	✅Succeeded	View (azurermps-6.13.0)

For more details, please refer to the build report.

Note: If you changed an existing file name or deleted a file, broken links in other files to the deleted or renamed file are listed only in the full build report.

[ghost]

Docs Build status updates of commit 8c23ac4:

🕙 Full build: the average full build time is 25 min(s) 31 sec(s), this is based on the last 126 build(s) for this repository.

[ghost]

Docs Build status updates of commit 8c23ac4:

✅ Validation status: passed

File	Status	Preview URL	Details
docs-conceptual/azps-1.8.0/uninstall-az-ps.md	✅Succeeded	View (azps-1.8.0)
docs-conceptual/azps-2.2.0/uninstall-az-ps.md	✅Succeeded	View (azps-2.2.0)
docs-conceptual/azurermps-5.7.0/uninstall-azurerm-ps.md	✅Succeeded	View (azurermps-5.7.0)
docs-conceptual/azurermps-6.13.0/uninstall-azurerm-ps.md	✅Succeeded	View (azurermps-6.13.0)

For more details, please refer to the build report.

Note: If you changed an existing file name or deleted a file, broken links in other files to the deleted or renamed file are listed only in the full build report.