Drop unused Delete() function

pkg/agent/dummy_data_gatherer.go

@@ -39,11 +39,6 @@ func (g *dummyDataGatherer) WaitForCacheSync(ctx context.Context) error {
 return nil
 }
 
-func (g *dummyDataGatherer) Delete() error {
-// no async functionality, see Fetch
-return nil
-}
-
 func (c *dummyDataGatherer) Fetch() (interface{}, int, error) {
 var err error
 if c.attemptNumber < c.FailedAttempts {

pkg/datagatherer/datagatherer.go

@@ -20,6 +20,4 @@ type DataGatherer interface {
 Run(ctx context.Context) error
 // WaitForCacheSync waits for the data gatherer's informers cache to sync.
 WaitForCacheSync(ctx context.Context) error
-// Delete, clear the cache of the DataGatherer if one is being used
-Delete() error
 }

pkg/datagatherer/k8s/discovery.go

@@ -57,11 +57,6 @@ func (g *DataGathererDiscovery) WaitForCacheSync(ctx context.Context) error {
 return nil
 }
 
-func (g *DataGathererDiscovery) Delete() error {
-// no async functionality, see Fetch
-return nil
-}
-
 // Fetch will fetch discovery data from the apiserver, or return an error
 func (g *DataGathererDiscovery) Fetch() (interface{}, int, error) {
 data, err := g.cl.ServerVersion()

pkg/datagatherer/k8s/dynamic.go

@@ -307,13 +307,6 @@ func (g *DataGathererDynamic) WaitForCacheSync(ctx context.Context) error {
 return nil
 }
 
-// Delete will flush the cache being used to stored resources gathered by the
-// informer
-func (g *DataGathererDynamic) Delete() error {
-g.cache.Flush()
-return nil
-}
-
 // Fetch will fetch the requested data from the apiserver, or return an error
 // if fetching the data fails.
 func (g *DataGathererDynamic) Fetch() (interface{}, int, error) {

pkg/datagatherer/local/local.go

@@ -43,11 +43,6 @@ func (g *DataGatherer) Run(ctx context.Context) error {
 return nil
 }
 
-func (g *DataGatherer) Delete() error {
-// no async functionality, see Fetch
-return nil
-}
-
 func (g *DataGatherer) WaitForCacheSync(ctx context.Context) error {
 // no async functionality, see Fetch
 return nil