Docs: update dispose return type (#22237)

* feat: update doc for dispose return type

* Change return type to undefined

* Without prettier

* Revert prettier changes

docs/api/en/helpers/CameraHelper.html

@@ -31,7 +31,6 @@ scene.add( helper );
 
 		<h2>Constructor</h2>
 
-
 		<h3>[name]( [param:Camera camera] )</h3>
 		<p>
 		[page:Camera camera] -- The camera to visualize.<br /><br />
@@ -39,13 +38,9 @@ scene.add( helper );
 		This create a new [Name] for the specified camera.
 		</p>
 
-
-
 		<h2>Properties</h2>
 		<p>See the base [page:LineSegments] class for common properties.</p>
 
-
-
 		<h3>[property:Camera camera]</h3>
 		<p>The camera being visualized.</p>
 
@@ -57,20 +52,16 @@ scene.add( helper );
 
 		<h3>[property:Object matrixAutoUpdate]</h3>
 		<p>
-			See [page:Object3D.matrixAutoUpdate]. Set to *false* here as the helper is using the
+			See [page:Object3D.matrixAutoUpdate]. Set to *false* here as the helper is using the 
 			camera's [page:Object3D.matrixWorld matrixWorld].
 		</p>
 
-
-
-
-
 		<h2>Methods</h2>
 		<p>See the base [page:LineSegments] class for common methods.</p>
 
-		<h3>[method:CameraHelper dispose]()</h3>
+		<h3>[method:undefined dispose]()</h3>
 		<p>
-		Disposes of the internally-created [page:Line.material material] and [page:Line.geometry geometry] used by this helper.
+			Disposes of the internally-created [page:Line.material material] and [page:Line.geometry geometry] used by this helper.
 		</p>
 
 		<h3>[method:null update]()</h3>

docs/api/en/lights/DirectionalLight.html

@@ -117,7 +117,7 @@
 
 		<p>See the base [page:Light Light] class for common methods.</p>
 
-		<h3>[method:DirectionalLight dispose]()</h3>
+		<h3>[method:undefined dispose]()</h3>
 		<p>
 		Override of base class's [page:Light.dispose dispose].
 		Disposes of this light's [page:DirectionalLightShadow shadow].

docs/api/en/lights/Light.html

@@ -52,7 +52,7 @@
 			See the base [page:Object3D Object3D] class for common methods.
 		</p>
 
-		<h3>[method:Light dispose]()</h3>
+		<h3>[method:undefined dispose]()</h3>
 		<p>
 		Abstract dispose method for lights; implemented by subclasses that have disposable resources.
 		</p>

docs/api/en/lights/PointLight.html

@@ -105,7 +105,7 @@ scene.add( light );
 			See the base [page:Light Light] class for common methods.
 		</p>
 
-		<h3>[method:PointLight dispose]()</h3>
+		<h3>[method:undefined dispose]()</h3>
 		<p>
 		Override of base class's [page:Light.dispose dispose].
 		Disposes of this light's [page:PointLightShadow shadow].

docs/api/en/lights/SpotLight.html

@@ -163,7 +163,7 @@ light.target = targetObject;
 
 		<p>See the base [page:Light Light] class for common methods.</p>
 
-		<h3>[method:SpotLight dispose]()</h3>
+		<h3>[method:undefined dispose]()</h3>
 		<p>
 		Override of base class's [page:Light.dispose dispose].
 		Disposes of this light's [page:SpotLightShadow shadow].

docs/api/en/lights/shadows/LightShadow.html

@@ -122,7 +122,7 @@
 		Used internally by the renderer to get the number of viewports that need to be rendered for this shadow.
 		</p>
 
-		<h3>[method:LightShadow dispose]()</h3>
+		<h3>[method:undefined dispose]()</h3>
 		<p>
 		Disposes of this shadow's textures ([page:LightShadow.map map] and [page:LightShadow.mapPass mapPass]).
 		</p>