Saying there's nothing to it
And then lettin' it go by the boards

from Fiona Apple – O' Sailor Lyrics on Rap Genius

Meaning

they promised her that there will be no trouble at all.

‘go by the boards’ means: 1) to let something be ruined or lost, 2)to have something planned and then not following through

this is a double reference to her career (1st definition) and album being put on the shelf (2nd definition)

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