Move "delete results" logic for master grid

should be easier to customize this way..?  previous way seemed to be broken

tailbone/static/js/tailbone.buefy.grid.js

@@ -244,16 +244,6 @@ let TailboneGrid = {
             this.$emit('deleteActionClicked', event.target.href)
         },
 
-        deleteResults(event) {
-
-            // submit form if user confirms
-            // TODO: how/where to get/show "plural model title" here?
-            // if (confirm("You are about to delete " + this.total + " ${grid.model_title_plural}.\n\nAre you sure?")) {
-            if (confirm("You are about to delete " + this.total.toLocaleString('en') + " objects.\n\nAre you sure?")) {
-                event.target.form.submit()
-            }
-        },
-
         checkedRowUUIDs() {
             let uuids = []
             for (let row of this.$data.checkedRows) {