next.js/packages/next/src/next-devtools/dev-overlay/icons/minimize.tsx

export function MinimizeIcon(props: React.SVGProps<SVGSVGElement>) {
  return (
    <svg
      xmlns="http://www.w3.org/2000/svg"
      width="16"
      height="16"
      viewBox="0 0 16 16"
      fill="none"
      {...props}
    >
      <path
        fillRule="evenodd"
        clipRule="evenodd"
        d="M1 6V4.5H4.5V1H6V5C6 5.55228 5.55228 6 5 6H1ZM11.5 1H10V5C10 5.55228 10.4477 6 11 6H15V4.5H11.5V1ZM15.04 11.5V10H11C10.4477 10 10 10.4477 10 11V15H11.5V11.5H15.04ZM4.5 15H6V11C6 10.4477 5.55228 10 5 10H1V11.5H4.5V15Z"
        fill="currentColor"
      />
    </svg>
  )
}