Clean up socket.h header #15539

Job	Run time
raspi-2 / initialize	46s
raspi-2-skia / initialize	44s
raspi-2-skia / docker-build-image	1m 54s
raspi-2-skia / docker-unittest-image	0s
raspi-2 / docker-build-image	1m 58s
raspi-2 / docker-unittest-image	0s
raspi-2-skia / raspi-2-skia_devel	5m 41s
raspi-2-skia / raspi-2-skia_debug	5m 47s
raspi-2-skia / raspi-2-skia_qa	10m 5s
raspi-2-skia / raspi-2-skia_gold	9m 39s
raspi-2 / raspi_devel	6m 1s
raspi-2 / raspi_debug	5m 50s
raspi-2 / raspi_qa	10m 7s
raspi-2 / raspi_gold	9m 47s
raspi-2 / sbversion-17_devel	5m 38s
raspi-2 / sbversion-17_debug	5m 42s
raspi-2 / sbversion-17_qa	10m 15s
raspi-2 / sbversion-17_gold	9m 46s
raspi-2-skia / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
raspi-2-skia / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
raspi-2 / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
raspi-2 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
	1h 39m 40s

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