Disable test-child-process-custom-fds.js

doc/api/child_processes.markdown

@@ -59,15 +59,19 @@ The third argument is used to specify additional options, which defaults to:
 
     { cwd: undefined,
       env: process.env,
-      customFds: [-1, -1, -1],
       setsid: false
     }
 
 `cwd` allows you to specify the working directory from which the process is spawned.
 Use `env` to specify environment variables that will be visible to the new process.
-With `customFds` it is possible to hook up the new process' [stdin, stdout, stderr] to
+
-existing streams; `-1` means that a new stream should be created. `setsid`,
+There is a deprecated option called `customFds` which allows one to specify
-if set true, will cause the subprocess to be run in a new session.
+specific file descriptors for the stdio of the child process. This API is
+was not portable to all platforms and therefore removed. 
+With `customFds` it was possible to hook up the new process' [stdin, stdout,
+stderr] to existing streams; `-1` meant that a new stream should be created.
+
+`setsid`, if set true, will cause the subprocess to be run in a new session.
 
 Example of running `ls -lh /usr`, capturing `stdout`, `stderr`, and the exit code:
 
@@ -217,8 +221,7 @@ In the child the `process` object will have a `send()` method, and `process`
 will emit objects each time it receives a message on its channel.
 
 By default the spawned Node process will have the stdin, stdout, stderr
-associated with the parent's. This can be overridden by using the
+associated with the parent's.
-`customFds` option.
 
 These child Nodes are still whole new instances of V8. Assume at least 30ms
 startup and 10mb memory for each new Node. That is, you cannot create many