front: use ui-icons for remove-via-button

Co-authored-by: Clara Ni <[email protected]>
Signed-off-by: Yohh <[email protected]>

front/src/modules/timesStops/TimesStopsInput.tsx

@@ -1,6 +1,7 @@
 /* eslint-disable react/jsx-no-useless-fragment */
 import { useCallback, useEffect, useState } from 'react';
 
+import { X } from '@osrd-project/ui-icons';
 import { isEqual, isNil } from 'lodash';
 import type { Operation } from 'react-datasheet-grid/dist/types';
 import { useTranslation } from 'react-i18next';
@@ -54,7 +55,7 @@ const createClearViaButton = ({
   if (isClearBtnShown) {
     return (
       <button data-testid="remove-via-button" type="button" onClick={removeVia}>
-        ❌
+        <X size="lg" />
       </button>
     );
   }