feat(user): style register page

Signed-off-by: SphericalKat <amolele@gmail.com>

lib/ketbin_web/templates/layout/app.html.eex

@@ -37,14 +37,6 @@
       <%= @inner_content %>
     </main>
     <footer class="font-bold">
-      <div class="copy-bg sm:hidden">
-      <button aria-label="Copy" viewbox="0 0 24 24" class="h-6 w-6 cursor-pointer fill-current text-white mr-4 copy-btn"">
-        <svg xmlns="http://www.w3.org/2000/svg" height="24" viewBox="0 0 24 24" width="24">
-          <path d="M0 0h24v24H0z" fill="none"></path>
-          <path d="M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z"></path>
-        </svg>
-      </button>
-    </div>
     <div class="flex px-4 py-1 text-xs sm:text-base justify-between text-amber" style="background: #1a1a1a; font-family: JetbrainsMono">
       <a href="https://sphericalk.at">
         © <%= DateTime.utc_now().year %> SphericalKat