Delete unused struct

Signed-off-by: PingWang <wang.ping5@zte.com.cn>

pkg/scheduler/algorithm/predicates/metadata.go

@@ -55,13 +55,6 @@ type topologyPair struct {
 	value string
 }
 
-//  Note that predicateMetadata and matchingPodAntiAffinityTerm need to be declared in the same file
-//  due to the way declarations are processed in predicate declaration unit tests.
-type matchingPodAntiAffinityTerm struct {
-	term *v1.PodAffinityTerm
-	node *v1.Node
-}
-
 type podSet map[*v1.Pod]struct{}
 
 type topologyPairSet map[topologyPair]struct{}