Update nodebrew.rb

Removing the binaries because they are corrupt and do not install correctly. 

```
 chronos@localhost ~/Downloads/Development/ama-website/public_html_ama $ nodebrew install stable 
Fetching: https://nodejs.org/dist/v9.2.0/node-v9.2.0.tar.gz
Warning: Failed to create the file 
Warning: /home/chronos/user/.nodebrew/src/v9.2.0/node-v9.2.0.tar.gz: No such 
Warning: file or directory

curl: (23) Failed writing body (0 != 940)
download failed: https://nodejs.org/dist/v9.2.0/node-v9.2.0.tar.gz
```

`crew install nodebrew -s` works.

packages/nodebrew.rb

@@ -7,19 +7,6 @@ class Nodebrew < Package
   source_url 'https://github.com/hokaccha/nodebrew/archive/v0.9.7.tar.gz'
   source_sha256 '3aa8b0cf30024d105f1ac6921aadf0440bc95bcae43df9d6ec58fc9de8cd352e'
 
-  binary_url ({
-    aarch64: 'https://dl.bintray.com/chromebrew/chromebrew/nodebrew-v0.9.7-1-chromeos-armv7l.tar.xz',
-     armv7l: 'https://dl.bintray.com/chromebrew/chromebrew/nodebrew-v0.9.7-1-chromeos-armv7l.tar.xz',
-       i686: 'https://dl.bintray.com/chromebrew/chromebrew/nodebrew-v0.9.7-1-chromeos-i686.tar.xz',
-     x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/nodebrew-v0.9.7-1-chromeos-x86_64.tar.xz',
-  })
-  binary_sha256 ({
-    aarch64: 'bd9aa8fcac6099e5367d687a90578cab3ec2281f50301c57268540b82d40b203',
-     armv7l: 'bd9aa8fcac6099e5367d687a90578cab3ec2281f50301c57268540b82d40b203',
-       i686: '8b4bf0c1169bf44b1d45a13d3adaff3c2a9573c43acd262bd3255ef07e276351',
-     x86_64: '8ec7697374c124d37cc905ba0d6e7c07fad4cbee789ada940d9528c114a691de',
-  })
-
   depends_on 'perl'
 
   def self.install