e2e storage: dead code removal and cleanup

Setting testParameters.scName had no effect because
StorageClassTest.StorageClassName isn't used anywhere. Instead, the
storage class name is generated dynamically.

test/e2e/storage/csi_mock_volume.go

@@ -168,13 +168,7 @@ var _ = utils.SIGDescribe("CSI mock volume", func() {
 			ClaimSize:            "1Gi",
 			ExpectedSize:         "1Gi",
 			DelayBinding:         m.tp.lateBinding,
-		}
+			AllowVolumeExpansion: m.tp.enableResizing,
-		if m.tp.scName != "" {
-			scTest.StorageClassName = m.tp.scName
-		}
-
-		if m.tp.enableResizing {
-			scTest.AllowVolumeExpansion = true
 		}
 
 		// The mock driver only works when everything runs on a single node.
@@ -354,7 +348,6 @@ var _ = utils.SIGDescribe("CSI mock volume", func() {
 			ginkgo.It(t.name, func() {
 				init(testParameters{
 					registerDriver: test.deployClusterRegistrar,
-					scName:         "csi-mock-sc-" + f.UniqueName,
 					podInfo:        test.podInfoOnMount})
 
 				defer cleanup()
@@ -682,7 +675,6 @@ var _ = utils.SIGDescribe("CSI mock volume", func() {
 				init(testParameters{
 					disableAttach:   true,
 					registerDriver:  true,
-					scName:          "csi-mock-sc-" + f.UniqueName,
 					javascriptHooks: scripts,
 				})
 				defer cleanup()

test/e2e/storage/testsuites/provisioning.go

@@ -52,7 +52,6 @@ type StorageClassTest struct {
 	Name                 string
 	CloudProviders       []string
 	Provisioner          string
-	StorageClassName     string
 	Parameters           map[string]string
 	DelayBinding         bool
 	ClaimSize            string