fix(web): drop the dead IconButton import in FileTile

The call site moved to Opal Button in 41f2bea, but this import used a
relative path and so was missed when the others were cleaned up. Nothing
referenced it.

Author: raunakab

web/src/refresh-components/tiles/FileTile.tsx

@@ -6,7 +6,6 @@ import { cn, clickOnKeyDown } from "@opal/utils";
 import { SvgMaximize2, SvgTextLines, SvgX } from "@opal/icons";
 import type { IconProps } from "@opal/types";
 import { Hoverable } from "@opal/core";
-import IconButton from "../buttons/IconButton";
 import Text from "../texts/Text";
 import Truncated from "../texts/Truncated";