Remove cache.OperatorCacheProvider interface. (#2680)

This interface is unused, so it can be removed as a step toward a
stable and supported cache package API.

Signed-off-by: Ben Luddy <[email protected]>
Upstream-repository: operator-lifecycle-manager
Upstream-commit: ddf92b1903cf36c5087eaf9b1be4916015f3f5c0

Author: benluddy

staging/operator-lifecycle-manager/pkg/controller/registry/resolver/cache/cache.go

@@ -90,8 +90,6 @@ type Cache struct {
 	m                      sync.RWMutex
 }
 
-var _ OperatorCacheProvider = &Cache{}
-
 type Option func(*Cache)
 
 func WithLogger(logger logrus.StdLogger) Option {

staging/operator-lifecycle-manager/pkg/controller/registry/resolver/resolver.go

@@ -29,7 +29,7 @@ type constraintProvider interface {
 }
 
 type Resolver struct {
-	cache                     cache.OperatorCacheProvider
+	cache                     *cache.Cache
 	log                       logrus.FieldLogger
 	pc                        *predicateConverter
 	systemConstraintsProvider constraintProvider