Remove cached directories and associated script blocks from appveyor CI configuration.
Remove cached directories and associated script blocks from appveyor CI configuration.

Github-Pull: #19444
Rebased-From: 961e667600441c35845fcb36b120500c813cd3ed

OmniLayer/omnicore,OmniLayer/omnicore,OmniLayer/omnicore,OmniLayer/omnicore,OmniLayer/omnicore,OmniLayer/omnicore