Chore: Remove dead code (#28664)

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

pkg/tsdb/request.go

@@ -2,6 +2,7 @@ package tsdb
 
 import (
 	"context"
+	"fmt"
 
 	"github.com/grafana/grafana/pkg/models"
 )
@@ -9,7 +10,14 @@ import (
 type HandleRequestFunc func(ctx context.Context, dsInfo *models.DataSource, req *TsdbQuery) (*Response, error)
 
 func HandleRequest(ctx context.Context, dsInfo *models.DataSource, req *TsdbQuery) (*Response, error) {
-	endpoint, err := getTsdbQueryEndpointFor(dsInfo)
+	var endpoint TsdbQueryEndpoint
+	fn, exists := registry[dsInfo.Type]
+	if !exists {
+		return nil, fmt.Errorf("Could not find executor for data source type: %s", dsInfo.Type)
+	}
+
+	var err error
+	endpoint, err = fn(dsInfo)
 	if err != nil {
 		return nil, err
 	}