src/vs/workbench/contrib/watermark/browser/watermark.ts/WatermarkContribution/destroy
class WatermarkContribution:	private destroy(): void {
		if (this.watermark) {
			this.watermark.remove();

			const container = this.layoutService.getContainer(Parts.EDITOR_PART);
			if (container) {
				container.classList.remove('has-watermark');
			}

			this.watermarkDisposable.clear();
		}
	}