Unit

remove JsSse::$closeBeforeUnload prop #34958

Job	Run time
Docs	30s
Behat (8.1, Chrome)	5m 41s
Demos Dockerfile	3m 1s
Smoke (latest, Phpunit)	25s
Behat (8.1, Chrome Lowest)	5m 44s
Smoke (latest, CodingStyle)	50s
Behat (8.2, Chrome)	5m 29s
Unit (7.4, Phpunit)	1m 50s
Smoke (latest, StaticAnalysis)	38s
Behat (8.2, Chrome Lowest)	5m 52s
Unit (7.4, Phpunit Lowest)	1m 56s
Behat (8.3, Chrome)	5m 43s
Unit (8.0, Phpunit)	1m 51s
Behat (8.3, Chrome Lowest)	5m 35s
Unit (8.0, Phpunit Lowest)	2m 3s
Unit (8.1, Phpunit)	1m 45s
Unit (8.1, Phpunit Lowest)	1m 48s
Unit (8.2, Phpunit)	1m 56s
Behat (latest, Firefox)	5m 58s
Unit (8.2, Phpunit Lowest)	2m 7s
Behat (latest, Chrome Slow)	10m 35s
Unit (8.3, Phpunit)	1m 48s
Behat (latest, Firefox Slow)	8m 31s
Unit (8.3, Phpunit Lowest)	2m 1s
Unit (latest, Phpunit Burn)	4m 57s
	1h 28m 34s

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