Cherry pick PR #4031: Remove polyfill.io reference #2322

Job	Run time
raspi-2 / initialize	5m 48s
raspi-2-skia / initialize	30s
raspi-2-skia / docker-build-image	35s
raspi-2-skia / docker-unittest-image	0s
raspi-2-skia / raspi-2-skia_devel	9m 16s
raspi-2-skia / raspi-2-skia_debug	12m 40s
raspi-2-skia / raspi-2-skia_qa	8m 30s
raspi-2-skia / raspi-2-skia_gold	11m 12s
raspi-2 / docker-build-image	35s
raspi-2 / docker-unittest-image	0s
raspi-2 / raspi_devel	8m 58s
raspi-2 / raspi_debug	13m 56s
raspi-2 / raspi_qa	8m 4s
raspi-2 / raspi_gold	8m 13s
raspi-2 / sbversion-15_devel	9m 0s
raspi-2 / sbversion-15_debug	13m 58s
raspi-2 / sbversion-15_qa	8m 6s
raspi-2 / sbversion-15_gold	8m 19s
raspi-2-skia / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
raspi-2-skia / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
raspi-2-skia / on-host-unit-test-report	0s
raspi-2 / ${{ matrix.name }}_${{ matrix.shard }}_test	0s
raspi-2 / ${{ matrix.name }}_on_device_${{ matrix.shard }}	0s
raspi-2 / on-host-unit-test-report	0s
	2h 7m 40s

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