Revert "Add mask editor integration to canvas workflow"

This reverts commit 7a7c8f2295.

js/CanvasLayers.js

@@ -734,36 +734,4 @@ export class CanvasLayers {
             }, 'image/png');
         });
     }
-
-    async getFlattenedCanvasAsDataURL() {
-        if (this.canvasLayers.layers.length === 0) return null;
-
-        const tempCanvas = document.createElement('canvas');
-        tempCanvas.width = this.canvasLayers.width;
-        tempCanvas.height = this.canvasLayers.height;
-        const tempCtx = tempCanvas.getContext('2d');
-        
-        const sortedLayers = [...this.canvasLayers.layers].sort((a, b) => a.zIndex - b.zIndex);
-        sortedLayers.forEach(layer => {
-            if (!layer.image) return;
-
-            tempCtx.save();
-            tempCtx.globalCompositeOperation = layer.blendMode || 'normal';
-            tempCtx.globalAlpha = layer.opacity !== undefined ? layer.opacity : 1;
-            const centerX = layer.x + layer.width / 2;
-            const centerY = layer.y + layer.height / 2;
-            tempCtx.translate(centerX, centerY);
-            tempCtx.rotate(layer.rotation * Math.PI / 180);
-            tempCtx.drawImage(
-                layer.image,
-                -layer.width / 2,
-                -layer.height / 2,
-                layer.width,
-                layer.height
-            );
-            tempCtx.restore();
-        });
-
-        return tempCanvas.toDataURL('image/png');
-    }
 }