chore: Remove old flashbar metrics #11775

Job	Run time
dry-run / Create build tree	3s
dry-run / Build browser-test-tools	2s
dry-run / Build build-tools	2s
dry-run / Build collection-hooks	5s
dry-run / Build documenter	3s
dry-run / Build global-styles	4s
dry-run / Build jest-preset	5s
dry-run / Build component-toolkit	4s
dry-run / Build test-utils	3s
dry-run / Build theming-core	2s
dry-run / Build components	2m 48s
dry-run / Build code view components	1m 1s
dry-run / Build board components	1m 48s
dry-run / Build chat components	1m 18s
dry-run / Components accessibility tests shards (1)	2m 19s
dry-run / Components integration tests shards (1)	8m 41s
dry-run / Components accessibility tests shards (2)	10m 11s
dry-run / Components integration tests shards (2)	11m 54s
dry-run / Components accessibility tests shards (3)	10m 16s
dry-run / Components motion tests	1m 10s
dry-run / Components unit tests	4m 1s
dry-run / Components integration tests shards (3)	7m 33s
dry-run / Components accessibility tests shards (4)	48s
dry-run / Components integration tests shards (4)	7m 19s
dry-run / Components accessibility tests shards (5)	10m 17s
dry-run / Components accessibility tests shards (6)	10m 7s
dry-run / Demos tests	8m 55s
dry-run / Components accessibility tests	1s
dry-run / Components integration tests	1s
	1h 41m 1s

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