Revert "Graph: Improve point rendering performance (#22610)" (#22716)

This reverts commit 0f676966.

public/vendor/flot/jquery.flot.js

@@ -2621,9 +2621,9 @@ Licensed under the MIT license.
                         ctx.fillStyle = fillStyle;
                         ctx.fill();
                     }
-                }
                     ctx.stroke();
                 }
+            }
 
             ctx.save();
             ctx.translate(plotOffset.left, plotOffset.top);