diff --git a/netmap/aggregator.go b/netmap/aggregator.go
index ed6bffee..e7095119 100644
--- a/netmap/aggregator.go
+++ b/netmap/aggregator.go
@@ -17,11 +17,6 @@ type (
 		Normalize(w float64) float64
 	}
 
-	meanSumAgg struct {
-		sum   float64
-		count int
-	}
-
 	meanAgg struct {
 		mean  float64
 		count int
@@ -31,10 +26,6 @@ type (
 		min float64
 	}
 
-	maxAgg struct {
-		max float64
-	}
-
 	meanIQRAgg struct {
 		k   float64
 		arr []float64
@@ -44,33 +35,21 @@ type (
 		min float64
 	}
 
-	maxNorm struct {
-		max float64
-	}
-
 	sigmoidNorm struct {
 		scale float64
 	}
 
-	constNorm struct {
-		value float64
-	}
-
 	// weightFunc calculates n's weight.
 	weightFunc = func(NodeInfo) float64
 )
 
 var (
-	_ aggregator = (*meanSumAgg)(nil)
 	_ aggregator = (*meanAgg)(nil)
 	_ aggregator = (*minAgg)(nil)
-	_ aggregator = (*maxAgg)(nil)
 	_ aggregator = (*meanIQRAgg)(nil)
 
 	_ normalizer = (*reverseMinNorm)(nil)
-	_ normalizer = (*maxNorm)(nil)
 	_ normalizer = (*sigmoidNorm)(nil)
-	_ normalizer = (*constNorm)(nil)
 )
 
 // newWeightFunc returns weightFunc which multiplies normalized
@@ -112,19 +91,6 @@ func newSigmoidNorm(scale float64) normalizer {
 	return &sigmoidNorm{scale: scale}
 }
 
-func (a *meanSumAgg) Add(n float64) {
-	a.sum += n
-	a.count++
-}
-
-func (a *meanSumAgg) Compute() float64 {
-	if a.count == 0 {
-		return 0
-	}
-
-	return a.sum / float64(a.count)
-}
-
 func (a *meanAgg) Add(n float64) {
 	c := a.count + 1
 	a.mean = a.mean*(float64(a.count)/float64(c)) + n/float64(c)
@@ -145,16 +111,6 @@ func (a *minAgg) Compute() float64 {
 	return a.min
 }
 
-func (a *maxAgg) Add(n float64) {
-	if n > a.max {
-		a.max = n
-	}
-}
-
-func (a *maxAgg) Compute() float64 {
-	return a.max
-}
-
 func (a *meanIQRAgg) Add(n float64) {
 	a.arr = append(a.arr, n)
 }
@@ -200,14 +156,6 @@ func (r *reverseMinNorm) Normalize(w float64) float64 {
 	return r.min / w
 }
 
-func (r *maxNorm) Normalize(w float64) float64 {
-	if r.max == 0 {
-		return 0
-	}
-
-	return w / r.max
-}
-
 func (r *sigmoidNorm) Normalize(w float64) float64 {
 	if r.scale == 0 {
 		return 0
@@ -217,7 +165,3 @@ func (r *sigmoidNorm) Normalize(w float64) float64 {
 
 	return x / (1 + x)
 }
-
-func (r *constNorm) Normalize(_ float64) float64 {
-	return r.value
-}