chore: remove legacy SkeletonBlock component

apps/frontend/src/shared/ui/SkeletonBlock.tsx

@@ -1,20 +0,0 @@
-export function SkeletonBlock({
-  width,
-  height,
-  borderRadius = 4,
-}: {
-  width?: string | number;
-  height?: string | number;
-  borderRadius?: number;
-}) {
-  return (
-    <div
-      className="skeleton"
-      style={{
-        width: width ?? '100%',
-        height: height ?? 16,
-        borderRadius,
-      }}
-    />
-  );
-}