"take away the border of bushes." A hedge is a row of bushes or small trees that have been planted in order to protect a garden or some other kind of area. Here "hedge" probably refers to the thorn bushes that were planted to grow on the stone wall surrounding the vineyard.
This can be stated in active form. AT: "no one will prune it or hoe it" or "no one will cut off the branches that are not needed, and no one will take care of the soil" (See: [[rc://en/ta/man/translate/figs-activepassive]])