[-] fix sql of Shared Buffers hit pct panel

[0xgouda]

The lines below in the Shard Buffers hit pct panel in the 0. Health Check dashboard are unnecessary and decrease query performance:

(data->>'xact_rollback')::int8 as roll, lag((data->>'xact_rollback')::int8) over w as roll_lag,
(data->>'xact_commit')::int8 as comm, lag((data->>'xact_commit')::int8) over w as comm_lag,

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It seems the query was copied as is from TX rollback pct, and those weren't removed.

[coveralls]

Pull Request Test Coverage Report for Build 19856710985

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 73.648%

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Totals
Change from base Build 19825348195:	0.0%
Covered Lines:	3678
Relevant Lines:	4994

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💛 - Coveralls

[pashagolub]

Good catch!