Remove UgaDraw as UGA was deprecated and removed from the UEFI spec

[sunnywang-arm]

UGA was deprecated and removed from the UEFI spec quite some time ago and has been replaced by GOP, so let's remove UgaDraw.

For details, please refer to #287 (comment)

For the UGA removal, please refer to tianocore/edk2#9834.

Cc @gapandya @edhay

[edhay]

@gapandya : Please assign the issue to yourself.

[gapandya]

Hi @edhay / @sunnywang-arm ,

Can you please assign this to me.