group prometheus imports

Signed-off-by: SungJin1212 <[email protected]>
Signed-off-by: Subhramit Basu Bhowmick <[email protected]>
Signed-off-by: subhramit <[email protected]>

Author: SungJin1212

execution/aggregate/khashaggregate.go

@@ -15,8 +15,6 @@ import (
 	"github.com/thanos-io/promql-engine/execution/telemetry"
 
 	"github.com/efficientgo/core/errors"
-	"github.com/prometheus/prometheus/promql/parser/posrange"
-	"github.com/prometheus/prometheus/util/annotations"
 	"golang.org/x/exp/slices"
 
 	"github.com/prometheus/prometheus/model/labels"