OvmfPkg/XenHypercallLib: Remove unused HobLib

Commit 0e6f6c715c59 removed the use of gEfiXenInfoGuid.

Fixes: 0e6f6c715c59 ("OvmfPkg/XenHypercallLib: Use direct hypercalls")
Signed-off-by: Anthony PERARD <anthony.perard@vates.tech>
2 files changed