e2e: update E2E testing for snapshot

with new implemntation when user creates a snapshot
in backend we are creating rbd image, we need to
validate the total images count in backend when
creating snapshots and clones.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

e2e/snapshot.go

@@ -2,7 +2,6 @@ package e2e
 
 import (
 	"context"
-	"encoding/json"
 	"fmt"
 	"strings"
 	"time"
@@ -18,13 +17,6 @@ import (
 	testutils "k8s.io/kubernetes/test/utils"
 )
 
-type snapInfo struct {
-	ID        int64  `json:"id"`
-	Name      string `json:"name"`
-	Size      int64  `json:"size"`
-	Timestamp string `json:"timestamp"`
-}
-
 func getSnapshotClass(path string) snapapi.VolumeSnapshotClass {
 	sc := snapapi.VolumeSnapshotClass{}
 	err := unmarshal(path, &sc)
@@ -121,17 +113,6 @@ func deleteSnapshot(snap *snapapi.VolumeSnapshot, t int) error {
 	})
 }
 
-func listSnapshots(f *framework.Framework, pool, imageName string) ([]snapInfo, error) {
-	command := fmt.Sprintf("rbd snap ls %s/%s --format=json", pool, imageName)
-	stdout, stdErr := execCommandInToolBoxPod(f, command, rookNamespace)
-	Expect(stdErr).Should(BeEmpty())
-
-	var snapInfos []snapInfo
-
-	err := json.Unmarshal([]byte(stdout), &snapInfos)
-	return snapInfos, err
-}
-
 func createRBDSnapshotClass(f *framework.Framework) {
 	scPath := fmt.Sprintf("%s/%s", rbdExamplePath, "snapshotclass.yaml")
 	sc := getSnapshotClass(scPath)