pkg(node-15.10.0): update to match

packages/node-15.10.0/build.sh

@@ -1,11 +1,4 @@
 #!/bin/bash
-
-mkdir -p build output
-
-cd build
-
 curl "https://nodejs.org/dist/v15.10.0/node-v15.10.0-linux-x64.tar.xz" -o node.tar.xz
 tar xf node.tar.xz --strip-components=1
-
-cd ..
-mv build/bin/node output
+rm node.tar.xz

packages/node-15.10.0/metadata.json

@@ -2,6 +2,5 @@
     "language": "node",
     "version": "15.10.0",
     "author": "Martin Kos <martinkos007@gmail.com>",
-    "dependencies": {},
     "aliases": ["node-javascript", "node-js", "javascript", "js"]
 }