fix up some dependency issues

package.json

@@ -10,15 +10,9 @@
   "devDependencies": {
     "@astrojs/sitemap": "^1.0.0",
     "astro": "^1.0.0-beta.31",
-    "astro-robots-txt": "^0.3.7"
+    "astro-robots-txt": "^0.3.7",
+    "@astrojs/rss": "^0.2.0"
   },
   "dependencies": {
-    "@astrojs/deno": "^0.1.2",
-    "@astrojs/renderer-preact": "^0.5.0",
-    "@astrojs/renderer-react": "^0.5.0",
-    "@astrojs/renderer-svelte": "^0.5.2",
-    "@astrojs/renderer-vue": "^0.4.0",
-    "@astrojs/rss": "^0.2.0",
-    "vite": "^2.9.9"
   }
 }