Removed unused 'WiFiNetworkScanned' structure. (#42811) #412

Job	Run time
Chef - Device functional tests (Linux)	14m 38s
Chef - Linux CI Examples (All chef devices)	52m 28s
Chef - ESP32 CI Examples	9m 32s
Chef - NRFConnect CI Examples	11m 32s
Chef - Telink CI Examples	8m 8s
	1h 36m 18s

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