Remove tests that are ignored on dart-sass #1552

Job	Run time
JS API \| Pure JS \| Browser	1m 21s
JS API \| Pure JS \| Node lts/* \| ubuntu-latest	1m 18s
Language \| Dart Sass \| Dart stable	1m 0s
JS API \| Embedded \| Node lts/* \| ubuntu-latest	4m 36s
JS API \| Pure JS \| Node lts/* \| windows-latest	2m 50s
Lint spec files	18s
Language \| Dart Sass \| Dart dev	1m 5s
JS API \| Pure JS \| Node lts/* \| macos-latest	1m 29s
JS API \| Embedded \| Node lts/* \| windows-latest	6m 48s
JS API \| Pure JS \| Node lts/-1 \| ubuntu-latest	1m 23s
JS API \| Embedded \| Node lts/* \| macos-latest	4m 18s
JS API \| Embedded \| Node lts/-1 \| ubuntu-latest	4m 58s
JS API \| Pure JS \| Node lts/-2 \| ubuntu-latest	1m 15s
Static analysis	19s
JS API \| Pure JS \| Node lts/-3 \| ubuntu-latest	1m 26s
Unit tests	37s
JS API \| Embedded \| Node lts/-2 \| ubuntu-latest	4m 50s
JS API \| Embedded \| Node lts/-3 \| ubuntu-latest	5m 1s
	44m 52s

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