Minor doc improvement

Author: wcandillon

docs/docs/getting-started/headless.md

@@ -41,67 +41,4 @@ import { Fill, draw } from "@shopify/react-native-skia/lib/commonjs/headless";
 
 React Native Skia relies on the [OffscreenCanvas API](https://developer.mozilla.org/en-US/docs/Web/API/OffscreenCanvas) to support GPU-Accelerated offscreen surfacs.
 This means, that to benefit from the GPU acceleration, you will need to provide a polyfill of the [OffscreenCanvas API](https://developer.mozilla.org/en-US/docs/Web/API/OffscreenCanvas) on Node.
-Below is our own OffScreenCanvas polyfill implementation that relies on WebGL using [headless-gl](https://github.com/stackgl/headless-gl).
-
-```tsx
-// Here we use gl for headless webgl support.
-import GL from "gl";
-
-// Now we need to provide polyfill for WebGLRenderingContext and OffscreenCanvas 
-// for Skia to be able to leverage WebGL
-global.WebGLRenderingContext = GL.WebGLRenderingContext;
-global.OffscreenCanvas = class OffscreenCanvasPolyfill
-  implements OffscreenCanvas
-{
-  private gl: WebGLRenderingContext;
-  constructor(public readonly width: number, public readonly height: number) {
-    this.gl = GL(width, height, {
-      preserveDrawingBuffer: true,
-    });
-  }
-  oncontextlost: ((this: OffscreenCanvas, ev: Event) => unknown) | null;
-  oncontextrestored: ((this: OffscreenCanvas, ev: Event) => unknown) | null;
-
-  transferToImageBitmap(): ImageBitmap {
-    throw new Error("Method not implemented.");
-  }
-
-  addEventListener(type: unknown, listener: unknown, options?: unknown): void {
-    throw new Error("Method not implemented.");
-  }
-
-  removeEventListener(
-    type: unknown,
-    listener: unknown,
-    options?: unknown
-  ): void {
-    throw new Error("Method not implemented.");
-  }
-
-  dispatchEvent(event: Event): boolean {
-    throw new Error("Method not implemented.");
-  }
-
-  getContext(ctx: string) {
-    if (ctx === "webgl") {
-      const _getUniformLocation = this.gl.getUniformLocation;
-      // Temporary fix for https://github.com/stackgl/headless-gl/issues/170
-      this.gl.getUniformLocation = function (program: any, name: any) {
-        if (program._uniforms && !/\[\d+\]$/.test(name)) {
-          const reg = new RegExp(`${name}\\[\\d+\\]$`);
-          for (let i = 0; i < program._uniforms.length; i++) {
-            const _name = program._uniforms[i].name;
-            if (reg.test(_name)) {
-              name = _name;
-            }
-          }
-        }
-        return _getUniformLocation.call(this, program, name);
-      };
-
-      return this.gl;
-    }
-    return null;
-  }
-};
-```
+For example, [here](https://gist.github.com/wcandillon/a46e922910a814139758d6eda9d99ff8) is an OffScreenCanvas polyfill implementation that relies on WebGL using [headless-gl](https://github.com/stackgl/headless-gl).