Cleanup of old search functionality (#110861)

* Remove support for initMinSize.
Remove support for searchAfterWrite option, now it defaults to true.

* Remove reference to deprecated feature toggle.

* Remove feature toggle completely.

* Remove code related to indexing on watch events.

* Fix compilation error.

* Remove unused field.

pkg/storage/unified/resource/server.go

@@ -22,6 +22,7 @@ import (
 	claims "github.com/grafana/authlib/types"
 	"github.com/grafana/dskit/backoff"
 	"github.com/grafana/dskit/ring"
+
 	"github.com/grafana/grafana/pkg/apimachinery/utils"
 	secrets "github.com/grafana/grafana/pkg/registry/apis/secret/contracts"
 	"github.com/grafana/grafana/pkg/storage/unified/resourcepb"
@@ -182,13 +183,6 @@ type SearchOptions struct {
 	// Skip building index on startup for small indexes
 	InitMinCount int
 
-	// Build empty index on startup for large indexes so that
-	// we don't re-attempt to build the index later.
-	InitMaxCount int
-
-	// Channel to watch for index events (for testing)
-	IndexEventsChan chan *IndexEvent
-
 	// Interval for periodic index rebuilds (0 disables periodic rebuilds)
 	RebuildInterval time.Duration
 
@@ -243,9 +237,6 @@ type ResourceServerOptions struct {
 
 	Ring           *ring.Ring
 	RingLifecycler *ring.BasicLifecycler
-
-	// Enable strong consistency for searches. When enabled, index is always updated with latest changes before search.
-	SearchAfterWrite bool
 }
 
 func NewResourceServer(opts ResourceServerOptions) (*server, error) {
@@ -343,7 +334,7 @@ func NewResourceServer(opts ResourceServerOptions) (*server, error) {
 
 	if opts.Search.Resources != nil {
 		var err error
-		s.search, err = newSearchSupport(opts.Search, s.backend, s.access, s.blob, opts.Tracer, opts.IndexMetrics, opts.Ring, opts.RingLifecycler, opts.SearchAfterWrite)
+		s.search, err = newSearchSupport(opts.Search, s.backend, s.access, s.blob, opts.Tracer, opts.IndexMetrics, opts.Ring, opts.RingLifecycler)
 		if err != nil {
 			return nil, err
 		}