chore(ComparisonSlider): add comments and remove unused code

src/widgets/ComparisonSlider/ui/ComparisonSlider/components/SliderLine.svelte

@@ -1,8 +1,18 @@
+<!--
+    Component: SliderLine
+    Visual representation of the slider line.
+-->
 <script lang="ts">
 import { cn } from '$shared/shadcn/utils/shadcn-utils';
 
 interface Props {
+    /**
+     * Position of the slider
+     */
     sliderPos: number;
+    /**
+     * Whether the slider is being dragged
+     */
     isDragging: boolean;
 }
 let { sliderPos, isDragging }: Props = $props();
@@ -44,12 +54,3 @@ let { sliderPos, isDragging }: Props = $props();
         <div class="w-3 h-3 bg-indigo-500 rounded-full shadow-lg ring-2 ring-white"></div>
     </div>
 </div>
-
-<!--
-    <style>
-
-        div {
-            box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.4);
-        }
-    </style>
--->