update PowerPoint API spreadsheet

Author: Rick-Kirkham

samples/powerpoint/preview-apis/tags.yaml

@@ -34,15 +34,6 @@ script:
           });
         }
 
-        async function deleteTag() {
-          await PowerPoint.run(async function (context) {
-            const slide = context.presentation.slides.getItemAt(0);
-            slide.tags.items[0].delete();
-
-            await context.sync();
-          });
-        }
-
         function getSelectedSlideIndex() {
           // Wrap a call of one of the Common APIs in a Promise-returning
           // function, so that it can be easily called within a run() method