chore(insights): Remove unused dashboard migration feature flags #237035

Job	Run time
detect what files changed	12s
cli test	2m 4s
backend migration tests	8m 16s
prepare selective tests	1m 32s
check migration	1m 54s
backend typing	4m 44s
monolith-dbs test	7m 2s
api docs test	5m 39s
requirements check	0s
api url typescript generation	0s
calculate test shards	2m 7s
backend test (1)	19m 0s
backend test (7)	20m 7s
backend test (2)	19m 53s
backend test (0)	19m 4s
backend test (11)	19m 12s
backend test (8)	19m 51s
backend test (4)	17m 16s
backend test (13)	21m 3s
backend test (10)	18m 49s
backend test (19)	19m 14s
backend test (14)	18m 2s
backend test (5)	19m 41s
backend test (21)	17m 54s
backend test (3)	19m 15s
backend test (16)	17m 31s
backend test (6)	21m 41s
backend test (17)	18m 57s
backend test (20)	20m 4s
backend test (18)	18m 48s
backend test (15)	17m 56s
backend test (12)	19m 22s
backend test (9)	19m 23s
Backend	2s
	7h 35m 35s

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