[#910] innerring: Make notary deposit on notification instead of timer

Timer is not suitable for notary deposits because it can never fire
in case of desynchronization or external epoch changes. Notary deposits
must be handled on new epoch event.

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

pkg/innerring/blocktimer.go

@@ -50,12 +50,6 @@ type (
 
 	depositor func() (util.Uint256, error)
 	awaiter   func(context.Context, util.Uint256) error
-
-	notaryDepositArgs struct {
-		l *zap.Logger
-
-		depositor depositor
-	}
 )
 
 func (s *Server) addBlockTimer(t *timer.BlockTimer) {
@@ -148,13 +142,3 @@ func newEmissionTimer(args *emitTimerArgs) *timer.BlockTimer {
 		},
 	)
 }
-
-func newNotaryDepositHandler(args *notaryDepositArgs) newEpochHandler {
-	return func() {
-		_, err := args.depositor()
-		if err != nil {
-			args.l.Warn("can't deposit notary contract",
-				zap.String("error", err.Error()))
-		}
-	}
-}