test(date-range): remove flaky blur test - FE-6850 #15617

Job	Run time
Lint	2m 39s
Test with Node 18 (1, 4)	2m 33s
Test with Node 18 (2, 4)	2m 17s
Test with Node 18 (3, 4)	2m 19s
Test with Node 18 (4, 4)	1m 48s
Test with Node 20 (1, 4)	2m 15s
Test with Node 20 (2, 4)	2m 8s
Test with Node 20 (3, 4)	1m 58s
Test with Node 20 (4, 4)	1m 36s
Get global coverage thresholds	9s
Check global coverage with Node 18	40s
Check global coverage with Node 20	30s
	20m 52s

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