RFR: 8210766: Remove obsolete qualified export sun.net.www to java.desktop

[Phil Race]

bug : https://bugs.openjdk.java.net/browse/JDK-8210766

The sun.applet implementation was removed a few days ago,
see http://hg.openjdk.java.net/jdk/client/rev/26a17d160081
This removed AppletClassLoader which consumed a class in sun.net.www
and thus needed a qualified export to java.desktop from java.base.
Now we don't need that qualified export any more .. so trivial diff below :

diff --git a/src/java.base/share/classes/module-info.java 
b/src/java.base/share/classes/module-info.java
--- a/src/java.base/share/classes/module-info.java
+++ b/src/java.base/share/classes/module-info.java
@@ -234,7 +234,6 @@
          jdk.jconsole,
          java.net.http;
      exports sun.net.www to
-        java.desktop,
          java.net.http,
          jdk.jartool;
      exports sun.net.www.protocol.http to

-phil.