frostfs: Remove AlphabetUpdate event from the configuration

It does not exist in code.
Refs #7.

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

frostfs/config.yml

@@ -47,12 +47,6 @@ events:
         type: ByteArray
       - name: keys
         type: Array
-  - name: AlphabetUpdate
-    parameters:
-      - name: id
-        type: ByteArray
-      - name: alphabet
-        type: Array
   - name: SetConfig
     parameters:
       - name: id

rpcclient/frostfs/client.go

@@ -50,12 +50,6 @@ type UnbindEvent struct {
 	Keys []any
 }
 
-// AlphabetUpdateEvent represents "AlphabetUpdate" event emitted by the contract.
-type AlphabetUpdateEvent struct {
-	Id       []byte
-	Alphabet []any
-}
-
 // SetConfigEvent represents "SetConfig" event emitted by the contract.
 type SetConfigEvent struct {
 	Id    []byte
@@ -710,77 +704,6 @@ func (e *UnbindEvent) FromStackItem(item *stackitem.Array) error {
 	return nil
 }
 
-// AlphabetUpdateEventsFromApplicationLog retrieves a set of all emitted events
-// with "AlphabetUpdate" name from the provided [result.ApplicationLog].
-func AlphabetUpdateEventsFromApplicationLog(log *result.ApplicationLog) ([]*AlphabetUpdateEvent, error) {
-	if log == nil {
-		return nil, errors.New("nil application log")
-	}
-
-	var res []*AlphabetUpdateEvent
-	for i, ex := range log.Executions {
-		for j, e := range ex.Events {
-			if e.Name != "AlphabetUpdate" {
-				continue
-			}
-			event := new(AlphabetUpdateEvent)
-			err := event.FromStackItem(e.Item)
-			if err != nil {
-				return nil, fmt.Errorf("failed to deserialize AlphabetUpdateEvent from stackitem (execution #%d, event #%d): %w", i, j, err)
-			}
-			res = append(res, event)
-		}
-	}
-
-	return res, nil
-}
-
-// FromStackItem converts provided [stackitem.Array] to AlphabetUpdateEvent or
-// returns an error if it's not possible to do to so.
-func (e *AlphabetUpdateEvent) FromStackItem(item *stackitem.Array) error {
-	if item == nil {
-		return errors.New("nil item")
-	}
-	arr, ok := item.Value().([]stackitem.Item)
-	if !ok {
-		return errors.New("not an array")
-	}
-	if len(arr) != 2 {
-		return errors.New("wrong number of structure elements")
-	}
-
-	var (
-		index = -1
-		err   error
-	)
-	index++
-	e.Id, err = arr[index].TryBytes()
-	if err != nil {
-		return fmt.Errorf("field Id: %w", err)
-	}
-
-	index++
-	e.Alphabet, err = func(item stackitem.Item) ([]any, error) {
-		arr, ok := item.Value().([]stackitem.Item)
-		if !ok {
-			return nil, errors.New("not an array")
-		}
-		res := make([]any, len(arr))
-		for i := range res {
-			res[i], err = arr[i].Value(), error(nil)
-			if err != nil {
-				return nil, fmt.Errorf("item %d: %w", i, err)
-			}
-		}
-		return res, nil
-	}(arr[index])
-	if err != nil {
-		return fmt.Errorf("field Alphabet: %w", err)
-	}
-
-	return nil
-}
-
 // SetConfigEventsFromApplicationLog retrieves a set of all emitted events
 // with "SetConfig" name from the provided [result.ApplicationLog].
 func SetConfigEventsFromApplicationLog(log *result.ApplicationLog) ([]*SetConfigEvent, error) {