web: remove the early prototype of cutout functionality

at the time of this commit, there are no models that are good enough and can run in a web browser. this feature might come back when web onnx gets support for beefier models.

web/src/lib/workers/removebg.ts

@@ -1,70 +0,0 @@
-import { AutoModel, AutoProcessor, RawImage } from "@huggingface/transformers";
-
-const models = {
-    light: {
-        id: "briaai/RMBG-1.4",
-        input: "input",
-    },
-    heavy: {
-        id: "onnx-community/BiRefNet_lite",
-        input: "input_image",
-    }
-}
-
-export const maskImage = (image: RawImage, mask: RawImage) => {
-    const canvas = new OffscreenCanvas(image.width, image.height);
-    const ctx = canvas.getContext('2d');
-
-    if (!ctx) return;
-
-    ctx.drawImage(image.toCanvas(), 0, 0);
-
-    const pixelData = ctx.getImageData(0, 0, image.width, image.height);
-    for (let i = 0; i < mask.data.length; ++i) {
-        pixelData.data[4 * i + 3] = mask.data[i];
-    }
-    ctx.putImageData(pixelData, 0, 0);
-
-    return canvas.transferToImageBitmap();
-}
-
-const removeImageBackground = async (file: File) => {
-    const image = await RawImage.fromBlob(file);
-
-    const model_type = "light";
-    const model = await AutoModel.from_pretrained(models[model_type].id, {
-        progress_callback: (progress) => {
-            console.log(progress);
-        },
-        device: "wasm",
-        dtype: "fp32",
-    });
-
-    console.log("we're past model loading!");
-
-    const processor = await AutoProcessor.from_pretrained(models[model_type].id, {});
-
-    console.log("now also past processor!");
-
-    if (model && processor) {
-        const { pixel_values } = await processor(image);
-        console.log("got pixel values");
-        const { output } = await model({ [models[model_type].input]: pixel_values });
-        console.log("got output");
-        const mask = await RawImage.fromTensor(output[0].mul(255).to('uint8')).resize(image.width, image.height);
-        console.log("got the mask");
-
-        self.postMessage({
-            cobaltRemoveBgWorker: {
-                result: maskImage(image, mask),
-            }
-        });
-    }
-}
-
-self.onmessage = async (event: MessageEvent) => {
-    if (event.data.cobaltRemoveBgWorker) {
-        await removeImageBackground(event.data.cobaltRemoveBgWorker.file);
-        self.close();
-    }
-}