docs: remove getPointSize documentation as it is not present in publi…

…c shaders

src/webgl/ShaderGenerator.js

@@ -1746,54 +1746,4 @@ if (typeof p5 !== 'undefined') {
  * }
  * </code>
  * </div>
- */
-
-/**
- * @function getPointSize
- * @experimental
- * @description
- * Registers a callback to modify the size of points when rendering with a shader.
- *
- * This hook can be used inside the following shader modify functions:
- * - <a href="#/p5/baseMaterialShader">baseMaterialShader()</a>.modify()
- * - <a href="#/p5/baseNormalShader">baseNormalShader()</a>.modify()
- * - <a href="#/p5/baseColorShader">baseColorShader()</a>.modify()
- * - <a href="#/p5/baseStrokeShader">baseStrokeShader()</a>.modify()
- * - <a href="#/p5/baseFilterShader">baseFilterShader()</a>.modify()
- *
- * Use this hook when drawing points (for example, with the point() function in WEBGL mode).
- * The callback receives the current point size (number) and should return the new size (number).
- *
- * This hook is available in:
- * - <a href="#/p5/baseMaterialShader">baseMaterialShader()</a>
- * - <a href="#/p5/baseNormalShader">baseNormalShader()</a>
- * - <a href="#/p5/baseColorShader">baseColorShader()</a>
- * - <a href="#/p5/baseStrokeShader">baseStrokeShader()</a>
- * - <a href="#/p5/baseFilterShader">baseFilterShader()</a>
- *
- * @param {function} callback
- *        A callback function which receives and returns the point size.
- *
- * @example
- * <div modernizr='webgl'>
- * <code>
- * let myShader;
- * function setup() {
- *   createCanvas(200, 200, WEBGL);
- *   myShader = baseMaterialShader().modify(() => {
- *     getPointSize(size => {
- *       // Make points pulse in size over time
- *       return size * (1.0 + 0.5 * sin(millis() * 0.002));
- *     });
- *   });
- * }
- * function draw() {
- *   background(255);
- *   shader(myShader);
- *   strokeWeight(20);
- *   stroke('blue');
- *   point(0, 0);
- * }
- * </code>
- * </div>
- */
+ */