RemixIconEx.System.delete_back

You're seeing just the function delete_back, go back to RemixIconEx.System module for more information.
Link to this function

delete_back(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.System.delete_back()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M6.535 3H21a1 1 0 0 1 1 1v16a1 1 0 0 1-1 1H6.535a1 1 0 0 1-.832-.445l-5.333-8a1 1 0 0 1 0-1.11l5.333-8A1 1 0 0 1 6.535 3zm.535 2l-4.666 7 4.666 7H20V5H7.07zM16 11v2H9v-2h7z" />
</svg>

example usage

svg.icon {
  width: 96;
  height: 96;
}