Deleted unused get-started modal code

refs https://github.com/TryGhost/Team/issues/1412

- we've switched to a full "done" page instead so the now-unused modal and related styling can be cleaned up

ghost/admin/app/components/modals/get-started.hbs

@@ -1,23 +0,0 @@
-<div class="modal-content gh-get-started" data-test-modal="get-started">
-    <button type="button" class="close" role="button" title="Close" {{on "click" @close}}>{{svg-jar "close"}}<span class="hidden">Close</span></button>
-
-    <section class="gh-get-started-welcome">
-        <header>
-            <h1>All set up!</h1>
-            <p>Your site is now ready to start publishing content.</p>
-            <p><LinkTo @route="dashboard" class="gh-btn gh-btn-green" {{on "click" @close}}><span>Start writing</span></LinkTo></p>
-        </header>
-        <footer>
-            <ul>
-                <li>
-                    <LinkTo @route="settings.membership" {{on "click" @close}}>Connect Stripe →</LinkTo>
-                    <p>Build a sustainable business.</p>
-                </li>
-                <li>
-                    <a href="https://ghost.org/docs/migration/" target="_blank" rel="noopener noreferrer" {{on "click" @close}}>Import members →</a>
-                    <p>Migrate your people to us.</p>
-                </li>
-            </ul>
-        </footer>
-    </section>
-</div>

ghost/admin/app/styles/layouts/main.css

@@ -2073,93 +2073,3 @@ section.gh-ds h2 {
         justify-content: center;
     }
 }
-
-/* Get started modal */
-/* ---------------------------------------------------- */
-
-@keyframes reveal {
-    from {
-        opacity: 0;
-        transform: translateY(32px);
-    }
-    to {
-        opacity: 1;
-        transform: translateY(0);
-    }
-}
-
-.epm-modal .modal-content.gh-get-started {
-    padding: 0;
-    background-image: url(img/get-started.jpg);
-    background-repeat: no-repeat;
-    background-position: top right;
-    background-size: cover;
-    border-radius: 6px;
-    overflow: hidden;
-    animation: reveal 275ms normal 800ms forwards ease-out;
-    opacity: 0;
-    transform: translateY(32px);
-}
-
-.modal-content.gh-get-started .close svg {
-    fill: var(--white);
-}
-
-.gh-get-started-welcome {
-    padding: 4rem 6rem 2rem 4rem;
-    width: 66%;
-    background: var(--white);
-}
-
-.gh-get-started-welcome header p:first-of-type {
-    margin-bottom: 1.75rem;
-    font-size: 1.5rem;
-    color: var(--midgrey);
-}
-
-.gh-get-started-welcome footer {
-    margin: 10rem 0 0;
-}
-
-.gh-get-started-welcome footer ul {
-    list-style: none;
-    padding: 0;
-    margin: 0;
-}
-
-.gh-get-started-welcome footer li {
-    margin: 0 0 0.5rem;
-    padding: 0 0 0 40px;
-    background: transparent;
-    background-repeat: no-repeat;
-    background-position: center left;
-    background-size: 20px;
-}
-
-.gh-get-started-welcome footer li:last-of-type {
-    margin-bottom: 0;
-}
-
-.gh-get-started-welcome footer li:first-of-type {
-    background-image: url(icons/get-started-members.svg);
-}
-
-.gh-get-started-welcome footer li:last-of-type {
-    background-image: url(icons/get-started-import.svg);
-}
-
-.gh-get-started-welcome footer a {
-    display: inline-block;
-    margin: 0 0 0.25rem;
-    font-size: 1.5rem;
-    font-weight: 500;
-    color: var(--darkgrey);
-}
-
-.gh-get-started-welcome footer a:hover {
-    color: var(--blackgrey);
-}
-
-.gh-get-started-welcome footer p {
-    color: var(--midgrey);
-}