Terms for subject Idiomatic containing it' s water under the bridge

English	Russian
it's all water under the bridge	всё это пустяки (Yeldar Azanbayev)
it's water under the bridge	ничего не попишешь (I should probably have asked for more money when I was offered the job, but hey, that's water under the bridge now. 4uzhoj)
it's water under the bridge	что было, то было (4uzhoj)
it's water under the bridge	дело прошлое (Val_Ships)
it's water under the bridge	что было, то прошло (VLZ_58)
it's water under the bridge	нечего прошлое ворошить (VLZ_58)