KVM: selftests: Remove obsolete and incorrect test case metadata

Delete inaccurate descriptions and obsolete metadata for test cases.
It adds zero value, and has a non-zero chance of becoming stale and
misleading in the future. No functional changes intended.

Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Like Xu <likexu@tencent.com>
Link: https://lore.kernel.org/r/20230914094803.94661-1-likexu@tencent.com


Signed-off-by: Sean Christopherson <seanjc@google.com>