Modify browser field in package.json for brave-core support

Author: yrliou

package.json

@@ -11,9 +11,6 @@
     "bittorrent-tracker": "./bin/cmd.js"
   },
   "browser": {
-    "./lib/common-node.js": false,
-    "./lib/client/http-tracker.js": false,
-    "./lib/client/udp-tracker.js": false,
     "./server.js": false
   },
   "bugs": {