Fix crash when deleting rows in raw tag editor

(closes #5840)

This didn't always trigger a crash, but it can.  It attempted to remove the
row containing the key/value input fields, however this ilne is unnecessary
because the change event will trigger a redraw and d3 will handle the removing
milliseconds later.

modules/ui/raw_tag_editor.js

@@ -347,7 +347,6 @@ export function uiRawTagEditor(context) {
             var t = {};
             t[d.key] = undefined;
             dispatch.call('change', this, t);
-            d3_select(this.parentNode).remove();
         }