I have a pre-made document and I want to remove a line (same length, same stroke, same color) from every page. Is there a quick way to do this aside from deleting manually?
You can use
Find / Change to search for objects and automatically change their attributes, but I don't know of a way to delete the objects in the same step.
Perhaps you could change the strokes to have both a Fill and Stroke color of None, thus making them disappear. Something like that.
Edit: since this was helpful, I added a screen shot.
You can either click Find and go through each object individually, or click Change All and the attributes of all objects of the defined type will be changed.