remove the now unneeded misc scripts

Author: Rayman

.travis.yml

@@ -27,9 +27,6 @@ before_install:
   - npm install -g npm
   - npm install -g grunt-cli karma-cli
 
-  # install the dev packages we need
-  - ./misc/install.sh
-
   # Set up Xfvb for Firefox headless testing
   - "export DISPLAY=:99.0"
   - "sh -e /etc/init.d/xvfb start"

CONTRIBUTING.md

@@ -17,8 +17,6 @@ roslibjs Build Setup
 	$ cd /path/to/roslibjs/
    	$ [sudo] npm install
 	```
- 3.5. If that doesn't work, install the [Cairo](http://cairographics.org/) graphics library manually for your os and retry
-   - [System specific instructions](https://github.com/Automattic/node-canvas/wiki/_pages)
 
 ### Build with Grunt
 

misc/check.sh

@@ -56,8 +56,7 @@
     "test": "grunt test",
     "test-examples": "grunt mochaTest:examples && karma start test/examples/karma.conf.js",
     "test-tcp": "grunt mochaTest:tcp",
-    "publish": "grunt build",
-    "preinstall": "sh misc/check.sh"
+    "publish": "grunt build"
   },
   "repository": {
     "type": "git",