fix: remove deprecated backup window flag

Author: phm07

internal/cmd/server/enable_backup.go

@@ -21,9 +21,6 @@ var EnableBackupCmd = base.Cmd{
 			TraverseChildren:      true,
 			DisableFlagsInUseLine: true,
 		}
-		cmd.Flags().String(
-			"window", "",
-			"(deprecated) The time window for the daily backup to run. All times are in UTC. 22-02 means that the backup will be started between 10 PM and 2 AM.")
 		return cmd
 	},
 	Run: func(s state.State, cmd *cobra.Command, args []string) error {
@@ -36,11 +33,6 @@ var EnableBackupCmd = base.Cmd{
 			return fmt.Errorf("server not found: %s", idOrName)
 		}
 
-		window, _ := cmd.Flags().GetString("window")
-		if window != "" {
-			cmd.Print("[WARN] The ability to specify a backup window when enabling backups has been removed. Ignoring flag.\n")
-		}
-
 		action, _, err := s.Client().Server().EnableBackup(s, server, "")
 		if err != nil {
 			return err