Remove wrong empty docker --filter #74

Job	Run time
Collect tests	5s
Test (runner_test)	1m 36s
Code coverage (runner_test)	1m 44s
Test (behat_bisect_test)	7m 59s
Code coverage (behat_bisect_test)	7m 9s
Test (postjobs_test)	15m 8s
Code coverage (postjobs_test)	13m 21s
Test (behat_test)	7m 37s
Code coverage (behat_test)	8m 33s
Test (phpunit_test)	9m 7s
Code coverage (phpunit_test)	7m 39s
Test (phpunit_bisect_test)	9m 6s
Code coverage (phpunit_bisect_test)	9m 9s
	1h 38m 13s

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