Remove promotion at start of description

It's a bit intense.

lib/rss.test.ts

@@ -47,3 +47,12 @@ Deno.test("generated rss contains promo with link to donations page", () => {
     "First promotion should come before the second",
   );
 });
+
+Deno.test("first promotion is removed", () => {
+  const series = testUtils.generateSeries();
+  const feed = rss.assembleFeed(series);
+  const indexOfFirstPromotion = feed.indexOf(
+    "NRSS er avhengig av din Vipps-støtte",
+  );
+  assertEquals(indexOfFirstPromotion, -1, "First promotion should be removed");
+});

lib/rss.ts

@@ -53,11 +53,10 @@ function assembleFeed(series: Series): string {
 }
 
 function descriptionWithDonationPromotion(description: string): string {
-  const firstPromotion = `⬇️NRSS er avhengig av din Vipps-støtte⬇️`;
-  const secondPromotion =
+  const promotion =
     `Takk for at du bruker NRSS 🙏🌟 Vurder å støtte utviklingen via Vipps med omtrent det samme som prisen på en kaffekopp. Se mer på https://nrss.deno.dev/`;
 
-  return `${firstPromotion}\n\n${description}\n\n${secondPromotion}`;
+  return `${description}\n\n${promotion}`;
 }
 
 function assembleEpisode(episode: Episode, seriesId: Series["id"]): Tag {