Cherry pick PR #4031: Remove polyfill.io reference #1050

Job	Run time
raspi-2 / initialize	44s
raspi-2-skia / initialize	47s
raspi-2 / docker-build-image	1m 33s
raspi-2 / docker-unittest-image	0s
raspi-2-skia / docker-build-image	1m 36s
raspi-2-skia / docker-unittest-image	0s
raspi-2 / raspi_devel	10m 38s
raspi-2 / raspi_debug	18m 42s
raspi-2 / raspi_qa	10m 11s
raspi-2 / raspi_gold	8m 37s
raspi-2 / sbversion-15_devel	10m 41s
raspi-2 / sbversion-15_debug	14m 28s
raspi-2 / sbversion-15_qa	8m 57s
raspi-2 / sbversion-15_gold	9m 12s
raspi-2 / sbversion-16_devel	10m 26s
raspi-2 / sbversion-16_debug	13m 20s
raspi-2 / sbversion-16_qa	8m 49s
raspi-2 / sbversion-16_gold	8m 34s
raspi-2-skia / raspi-2-skia_devel	14m 20s
raspi-2-skia / raspi-2-skia_debug	14m 25s
raspi-2-skia / raspi-2-skia_qa	10m 33s
raspi-2-skia / raspi-2-skia_gold	9m 17s
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
	3h 5m 50s

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