Remove unused assert

Author: garronej

package.json

@@ -1,6 +1,6 @@
 {
     "name": "@codegouvfr/react-dsfr",
-    "version": "0.25.0",
+    "version": "0.25.1",
     "description": "French State Design System React integration library",
     "repository": {
         "type": "git",

stories/ColorHelper.tsx

@@ -10,7 +10,6 @@ import { Fzf } from "fzf";
 import { createMakeAndWithStyles } from "tss-react";
 import { MuiDsfrThemeProvider } from "../dist/mui";
 import Tooltip from "@mui/material/Tooltip";
-import { assert } from "tsafe/assert";
 
 const { useStyles } = createMakeAndWithStyles({ "useTheme": useColors });