Remove unneeded defines.

Mostly Q_DISABLE_COPY that were covered by the un-copy-ability of the
respective base classes. Includes a few "stylistic" whitespace changes.

Change-Id: I31ca0e7bada5ed0f34776976efe22ddc444a5bf2
Reviewed-on: http://codereview.qt.nokia.com/1609
Reviewed-by: hjk <qthjk@ovi.com>

src/libs/extensionsystem/pluginmanager.h

@@ -47,8 +47,9 @@ QT_END_NAMESPACE
 
 namespace ExtensionSystem {
 class PluginCollection;
+
 namespace Internal {
-    class PluginManagerPrivate;
+class PluginManagerPrivate;
 }
 
 class IPlugin;
@@ -56,7 +57,6 @@ class PluginSpec;
 
 class EXTENSIONSYSTEM_EXPORT PluginManager : public QObject
 {
-    Q_DISABLE_COPY(PluginManager)
     Q_OBJECT
 
 public: