Delete unused starboard thread files #11484

Job	Run time
raspi-2 / initialize	43s
raspi-2-skia / initialize	41s
raspi-2-skia / docker-build-image	1m 6s
raspi-2-skia / docker-unittest-image	0s
raspi-2 / docker-build-image	1m 9s
raspi-2 / docker-unittest-image	0s
raspi-2-skia / raspi-2-skia_devel	8m 24s
raspi-2-skia / raspi-2-skia_debug	12m 27s
raspi-2-skia / raspi-2-skia_qa	7m 29s
raspi-2-skia / raspi-2-skia_gold	7m 51s
raspi-2 / raspi_devel	8m 49s
raspi-2 / raspi_debug	11m 47s
raspi-2 / raspi_qa	9m 57s
raspi-2 / raspi_gold	7m 24s
raspi-2 / sbversion-15_devel	9m 4s
raspi-2 / sbversion-15_debug	12m 14s
raspi-2 / sbversion-15_qa	7m 44s
raspi-2 / sbversion-15_gold	7m 58s
raspi-2 / sbversion-16_devel	8m 30s
raspi-2 / sbversion-16_debug	11m 43s
raspi-2 / sbversion-16_qa	7m 45s
raspi-2 / sbversion-16_gold	7m 22s
raspi-2 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
raspi-2 / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
raspi-2-skia / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
raspi-2-skia / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
	2h 30m 7s

Provide feedback