Remove bin/test.js

Rely on airtap to skip the browser tests in Travis PRs. No need for our custom script!

package.json

@@ -115,7 +115,7 @@
     "build": "browserify -s WebTorrent -e ./ | babili > webtorrent.min.js",
     "build-debug": "browserify -s WebTorrent -e ./ > webtorrent.debug.js",
     "size": "npm run build && cat webtorrent.min.js | gzip | wc -c",
-    "test": "standard && node ./bin/test.js",
+    "test": "standard && npm run test-node && npm run test-browser",
     "test-browser": "airtap -- test/*.js test/browser/*.js",
     "test-browser-local": "airtap --local -- test/*.js test/browser/*.js",
     "test-node": "tape test/*.js test/node/*.js",