Core: Remove deprecated code.

[Mugen87]

Related issue: -

Description

According to the project's policy, legacy code is removed after ten releases. The PR removes code which has been deprecated for quite a while now:

• The amount parameter of ExtrudeGeometry has been renamed with r93 ( ExtrudeGeometry: Renamed option "amount" to "depth". #13949).
• ObjectLoader.setTexturePath() has been renamed with r98 (ObjectLoader: Added setPath(), setTexturePath() -> setResourcePath(). #14977).
• Quaternion.slerp() has been removed with r127 (Quaternion: Add slerpQuaternions(), deprecate static slerp(). #21532).

[LeviPesin]

Can we also remove utils/exporters/blender? It was removed in r92 and just a notice remains there.

[mrdoob]

Thanks!

[mrdoob]

@LeviPesin

Can we also remove utils/exporters/blender? It was removed in r92 and just a notice remains there.

I think so yes!

[LeviPesin]

I think we should also remove some long-deprecated checks like

three.js/src/math/Matrix4.js

Line 20 in 3840ae0

console.error( 'THREE.Matrix4: the constructor no longer reads arguments. use .set() instead.' );

and

three.js/src/math/Matrix4.js

Line 346 in 3840ae0

console.warn( 'THREE.Matrix4: .multiply() now only accepts one argument. Use .multiplyMatrices( a, b ) instead.' );

.