Remove some redundant "www."s.

collects/scribblings/main/getting-started.scrbl

@@ -4,7 +4,7 @@
 @title{Getting Started with Racket}
 
 To get started with Racket,
-@link["http://www.racket-lang.org/download/"]{download it} from the web page and
+@link["http://racket-lang.org/download/"]{download it} from the web page and
 install it. If you are a beginner or would like to use a graphical environment
 to run programs, run the @exec{DrRacket} executable. Otherwise, the @exec{racket}
 executable will run a command-line Read-Eval-Print-Loop

collects/scribblings/scribble/config.scrbl

@@ -140,13 +140,13 @@ attributes.} For example, this Scribble document:
     (style #f
            (list (alt-tag "img")
                  (attributes
-                  '((src . "http://www.racket-lang.org/icon.png")))))))
+                  '((src . "http://racket-lang.org/icon.png")))))))
 
 @external-image
 }|
 
 renders as the the Racket logo at the url
-@url{http://www.racket-lang.org/logo.png}
+@url{http://racket-lang.org/logo.png}
 when producing html.
 
 @; ------------------------------------------------------------

collects/tests/scribble/markdown-docs/example.md

@@ -18,7 +18,7 @@ Here is an itemize:
 
 Here is a hyperlink:
 
-[I am a hyperlink to Racket.](http://www.racket-lang.org/)
+[I am a hyperlink to Racket.](http://racket-lang.org/)
 
 _Italic_. \_Just underlines\_.
 

collects/tests/scribble/markdown-docs/example.scrbl

@@ -26,7 +26,7 @@ Here is an itemize:
 
 Here is a hyperlink:
 
-@hyperlink["http://www.racket-lang.org/" "I am a hyperlink to Racket."]
+@hyperlink["http://racket-lang.org/" "I am a hyperlink to Racket."]
 
 @italic{Italic}.
 _Just underlines_.