diff --git a/promql/engine.go b/promql/engine.go
index 034e545568..1756abbd68 100644
--- a/promql/engine.go
+++ b/promql/engine.go
@@ -2536,7 +2536,7 @@ type groupedAggregation struct {
 func (ev *evaluator) aggregation(e *parser.AggregateExpr, grouping []string, param interface{}, vec Vector, seriesHelper []EvalSeriesHelper, enh *EvalNodeHelper) (Vector, annotations.Annotations) {
 	op := e.Op
 	without := e.Without
-	annos := annotations.Annotations{}
+	var annos annotations.Annotations
 	result := map[uint64]*groupedAggregation{}
 	orderedResult := []*groupedAggregation{}
 	var k int64
diff --git a/promql/functions.go b/promql/functions.go
index ecd6f7c8b4..5fd54f6c76 100644
--- a/promql/functions.go
+++ b/promql/functions.go
@@ -77,7 +77,7 @@ func extrapolatedRate(vals []parser.Value, args parser.Expressions, enh *EvalNod
 		resultHistogram    *histogram.FloatHistogram
 		firstT, lastT      int64
 		numSamplesMinusOne int
-		annos              = annotations.Annotations{}
+		annos              annotations.Annotations
 	)
 
 	// We need either at least two Histograms and no Floats, or at least two
@@ -88,14 +88,6 @@ func extrapolatedRate(vals []parser.Value, args parser.Expressions, enh *EvalNod
 		return enh.Out, annos.Add(annotations.NewMixedFloatsHistogramsWarning(metricName, args[0].PositionRange()))
 	}
 
-	if isCounter && metricName != "" && len(samples.Floats) > 0 &&
-		!strings.HasSuffix(metricName, "_total") &&
-		!strings.HasSuffix(metricName, "_sum") &&
-		!strings.HasSuffix(metricName, "_count") &&
-		!strings.HasSuffix(metricName, "_bucket") {
-		annos.Add(annotations.NewPossibleNonCounterInfo(metricName, args[0].PositionRange()))
-	}
-
 	switch {
 	case len(samples.Histograms) > 1:
 		numSamplesMinusOne = len(samples.Histograms) - 1
@@ -642,7 +634,7 @@ func funcQuantileOverTime(vals []parser.Value, args parser.Expressions, enh *Eva
 		return enh.Out, nil
 	}
 
-	annos := annotations.Annotations{}
+	var annos annotations.Annotations
 	if math.IsNaN(q) || q < 0 || q > 1 {
 		annos.Add(annotations.NewInvalidQuantileWarning(q, args[0].PositionRange()))
 	}
@@ -1105,7 +1097,7 @@ func funcHistogramFraction(vals []parser.Value, args parser.Expressions, enh *Ev
 func funcHistogramQuantile(vals []parser.Value, args parser.Expressions, enh *EvalNodeHelper) (Vector, annotations.Annotations) {
 	q := vals[0].(Vector)[0].F
 	inVec := vals[1].(Vector)
-	annos := annotations.Annotations{}
+	var annos annotations.Annotations
 
 	if math.IsNaN(q) || q < 0 || q > 1 {
 		annos.Add(annotations.NewInvalidQuantileWarning(q, args[0].PositionRange()))