NodeMaterial: Remove `shadowPositionNode` fallback to reduce CPU load. (#32699)

src/materials/nodes/NodeMaterial.js

@@ -25,7 +25,7 @@ import { modelViewMatrix } from '../../nodes/accessors/ModelNode.js';
 import { vertexColor } from '../../nodes/accessors/VertexColorNode.js';
 import { premultiplyAlpha } from '../../nodes/display/BlendModes.js';
 import { subBuild } from '../../nodes/core/SubBuildNode.js';
-import { error, warn } from '../../utils.js';
+import { error } from '../../utils.js';
 
 /**
  * Base class for all node materials.
@@ -398,26 +398,6 @@ class NodeMaterial extends Material {
 		 */
 		this.contextNode = null;
 
-		// Deprecated properties
-
-		Object.defineProperty( this, 'shadowPositionNode', { // @deprecated, r176
-
-			get: () => {
-
-				return this.receivedShadowPositionNode;
-
-			},
-
-			set: ( value ) => {
-
-				warn( 'NodeMaterial: ".shadowPositionNode" was renamed to ".receivedShadowPositionNode".' );
-
-				this.receivedShadowPositionNode = value;
-
-			}
-
-		} );
-
 	}
 
 	/**