Change Object Style with Script

Wouldn't it make more sense to change it from 1pt to 0pt?

I don't know if this will help you, but the script below will remove/make the stroke on all items, on all pages to 0pt:

var doc = app.activeDocument;

for(var i = 0; i < doc.pages.length; i++) {

    doc.pages.item(i).pageItems.everyItem().strokeWeight = 0;

}

EDIT: You could also target the Object Style directly, I think that is what you are really looking for, see below:

var doc = app.activeDocument;

for(var i = 0; i < doc.pages.length; i++) {

    doc.objectStyles.itemByName("myObjectStyle").strokeColor = "None";

}

Hope this points you in the right direction.