Remove unused import

examples/audio/spatial_audio_2d.rs

@@ -1,9 +1,5 @@
 //! This example illustrates how to load and play an audio file, and control where the sounds seems to come from.
-use bevy::{
-    audio::{AudioPlugin, SpatialScale},
-    prelude::*,
-    sprite::MaterialMesh2dBundle,
-};
+use bevy::{audio::SpatialScale, prelude::*, sprite::MaterialMesh2dBundle};
 
 /// Spatial audio uses the distance to attenuate the sound volume. In 2D with the default camera,
 /// 1 pixel is 1 unit of distance, so we use a scale so that 100 pixels is 1 unit of distance for