Update Packet metadata generation based on feedback (#27490)

server/public/plugin/api.go

@@ -1306,13 +1306,6 @@ type API interface {
 	// @tag User
 	// Minimum server version: 9.8
 	UpdateUserRoles(userID, newRoles string) (*model.User, *model.AppError)
-
-	// GenerateSupportMetadata generates the metadata for a support packet.
-	// pluginMeta should contain the values that plugin wants to insert into a standard support packet metadata.
-	//
-	// @tag Metadata
-	// Minimum server version: 9.10
-	GenerateSupportMetadata(pluginMeta map[string]any) (*model.Metadata, error)
 }
 
 var handshake = plugin.HandshakeConfig{