Clean up socket.h header #15546

Job	Run time
raspi-2 / initialize	46s
raspi-2-skia / initialize	51s
raspi-2 / docker-build-image	1m 57s
raspi-2 / docker-unittest-image	0s
raspi-2-skia / docker-build-image	1m 53s
raspi-2-skia / docker-unittest-image	0s
raspi-2 / raspi_devel	8m 20s
raspi-2 / raspi_debug	8m 22s
raspi-2 / raspi_qa	8m 20s
raspi-2 / raspi_gold	8m 21s
raspi-2 / sbversion-17_devel	8m 21s
raspi-2 / sbversion-17_debug	8m 21s
raspi-2 / sbversion-17_qa	8m 20s
raspi-2 / sbversion-17_gold	8m 21s
raspi-2-skia / raspi-2-skia_devel	7m 15s
raspi-2-skia / raspi-2-skia_debug	7m 16s
raspi-2-skia / raspi-2-skia_qa	7m 15s
raspi-2-skia / raspi-2-skia_gold	7m 14s
raspi-2-skia / ${{ matrix.name }}_on_device_${{ matrix.shard }}	1s
raspi-2-skia / ${{ matrix.name }}_${{ matrix.shard }}_test	1s
raspi-2 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	1s
raspi-2 / ${{ matrix.name }}_${{ matrix.shard }}_test	1s
	1h 41m 17s

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