Revert "fix: fix nil pointer error" #3324

Job	Run time
unit-test	2m 12s
unit-test	2m 12s
lint	52s
lint	52s
e2e-test (e2e/v2beta1/e2e_test.go)	6m 40s
e2e-test (e2e/v2beta1/e2e_test.go)	6m 40s
e2e-test (e2e/v2beta1/e2e_rebalance_test.go)	3m 58s
e2e-test (e2e/v2beta1/e2e_rebalance_test.go)	3m 58s
e2e-test (e2e/v1beta4/e2e_blure_green_upgrade_test.go)	4m 14s
e2e-test (e2e/v1beta4/e2e_blure_green_upgrade_test.go)	4m 14s
e2e-test (e2e/v1beta4/e2e_base_test.go)	4m 6s
e2e-test (e2e/v1beta4/e2e_base_test.go)	4m 6s
e2e-test (e2e/v1beta4/e2e_upgrade_test.go)	5m 52s
e2e-test (e2e/v1beta4/e2e_upgrade_test.go)	3m 22s
codecov	0s
codecov	8s
	53m 26s

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