Remove console log from PlaneGeometry

Doesn't seem like we need a console log every time PlaneGeometry is used. Is PlaneGeometry really that bad?

src/extras/geometries/PlaneGeometry.js

@@ -5,8 +5,6 @@
 
 THREE.PlaneGeometry = function ( width, height, widthSegments, heightSegments ) {
 
-	console.log( 'THREE.PlaneGeometry: Consider using THREE.PlaneBufferGeometry for lower memory footprint.' );
-
 	THREE.Geometry.call( this );
 
 	this.type = 'PlaneGeometry';