Docs: Clean up.

Author: Mugen87

docs/examples/en/controls/TransformControls.html

@@ -111,11 +111,6 @@ <h3>[property:Boolean showX]</h3>
 			Whether or not the x-axis helper should be visible. Default is *true*.
 		</p>
 
-		<h3>[property:Boolean showX]</h3>
-		<p>
-			Whether or not the x-axis helper should be visible. Default is *true*.
-		</p>
-
 		<h3>[property:Boolean showY]</h3>
 		<p>
 			Whether or not the y-axis helper should be visible. Default is *true*.

docs/examples/zh/controls/TransformControls.html

@@ -111,11 +111,6 @@ <h3>[property:Boolean showX]</h3>
 			Whether or not the x-axis helper should be visible. Default is *true*.
 		</p>
 
-		<h3>[property:Boolean showX]</h3>
-		<p>
-			Whether or not the x-axis helper should be visible. Default is *true*.
-		</p>
-
 		<h3>[property:Boolean showY]</h3>
 		<p>
 			Whether or not the y-axis helper should be visible. Default is *true*.

examples/jsm/controls/TransformControls.d.ts

@@ -27,7 +27,6 @@ export class TransformControls extends Object3D {
   showY: boolean;
   showZ: boolean;
   isTransformControls: boolean;
-  visible: boolean;
   mouseButtons: {
     LEFT: MOUSE;
     MIDDLE: MOUSE;