Revert "add manyToManyThrough test"
Revert "add manyToManyThrough test"

This reverts commit fc0c671a98acfa997461533f9e34a812ddcd65dc.

atiertant/offshore,jianpingw/waterline,luislobo/waterline,ctartist621/waterline,scippio/waterline,Zaggen/waterline,balderdashy/waterline,Atlantis-Software/offshore,Atlantis-Software/waterline