[Basic] Remove getVirtualFile (#151086)
This patch removes getVirtualFile because it has been deprecated for
more than 10 months since:
commit b1aea98cfa357e23f4bb52232da5f41781f23bff
Author: Jan Svoboda <jan_svoboda@apple.com>
Date: Wed Sep 25 10:36:44 2024 -0700
I'm not aware of any downstream use AFAICT.
