Subtract

<svg class="bi bi-subtract" width="1em" height="1em" viewBox="0 0 16 16" fill="currentColor" xmlns="http://www.w3.org/2000/svg">
  <path d="M4 12v2.5A1.5 1.5 0 0 0 5.5 16h9a1.5 1.5 0 0 0 1.5-1.5v-9A1.5 1.5 0 0 0 14.5 4H12v6.5a1.5 1.5 0 0 1-1.5 1.5H4z"/>
  <path fill-rule="evenodd" d="M10.5 1h-9a.5.5 0 0 0-.5.5v9a.5.5 0 0 0 .5.5h9a.5.5 0 0 0 .5-.5v-9a.5.5 0 0 0-.5-.5zm-9-1A1.5 1.5 0 0 0 0 1.5v9A1.5 1.5 0 0 0 1.5 12h9a1.5 1.5 0 0 0 1.5-1.5v-9A1.5 1.5 0 0 0 10.5 0h-9z"/>
</svg>