Remove TODO in ../ovn/gateway_dataplane.go since an issues is raised #4905

Job	Run time
No "Apply suggestions from code review" Commits	5s
Submariner K8s API Code Generation	1m 25s
Commit Message(s)	11s
Protobuf Code Generation	30s
Go	3m 7s
Dependency Licenses	2m 3s
Markdown Links (modified files)	14s
Markdown	11s
Package Documentation	56s
Shell	11s
Variant Analysis	3m 1s
Vulnerability Scanning	21s
YAML	35s
	12m 50s

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