refactor(scss): remove alert style and script

It is not used in this theme

assets/scss/style.scss

@@ -41,23 +41,3 @@ a {
         }
     }
 }
-
-.alert {
-    position: fixed;
-    right: 20px;
-    bottom: 20px;
-    z-index: 5;
-    background: var(--card-background);
-    max-width: 400px;
-    padding: 15px 20px;
-    border-radius: var(--card-border-radius);
-    line-height: 1.75;
-    color: var(--card-text-color-secondary);
-    box-shadow: var(--shadow-l2);
-
-    @media (max-width: $on-phone) {
-        max-width: 100vw;
-        width: calc(100% - 30px);
-        left: 15px;
-    }
-}

assets/ts/main.ts

@@ -65,29 +65,6 @@ let Stack = {
 
             observer.observe(articleTile)
         }
-    },
-    alert: (content, time = 5000, animationSpeed = 500) => {
-        const alert = document.createElement('div');
-        alert.innerHTML = content;
-        alert.className = 'alert';
-        alert.style.visibility = 'hidden';
-        document.body.appendChild(alert);
-
-        alert.style.transform = `translateY(${alert.clientHeight + 50}px)`;
-        alert.style.transition = `transform ${animationSpeed / 1000}s ease`;
-
-        setTimeout(() => {
-            alert.style.removeProperty('visibility');
-            alert.style.transform = `translateY(0)`;
-        }, animationSpeed);
-
-        setTimeout(() => {
-            alert.style.transform = `translateY(${alert.clientHeight + 50}px)`;
-        }, animationSpeed + time);
-
-        setTimeout(() => {
-            alert.remove();
-        }, 2 * animationSpeed + time);
     }
 }