Remove outdated link from an example

gobyexample doesn't use pygments anymore, so the generate program doesn't
spawn anything.

examples/spawning-processes/spawning-processes.go

@@ -1,9 +1,5 @@
 // Sometimes our Go programs need to spawn other, non-Go
-// processes. For example, the syntax highlighting on this
-// site is [implemented](https://github.com/mmcgrana/gobyexample/blob/master/tools/generate.go)
-// by spawning a [`pygmentize`](http://pygments.org/)
-// process from a Go program. Let's look at a few examples
-// of spawning processes from Go.
+// processes.
 
 package main
 

examples/spawning-processes/spawning-processes.hash

@@ -1,2 +1,2 @@
-b6e1e4b70a494be9f344a9f31aff520116d0ac24
-YJs_YtJY0sS
+aaedc48f74409cef2b8e9ad624aa1c4639ce630d
+s-T7gxeD7hH