Clean up single namespace forward-declarations

Done using the following ruby script:

Dir.glob('**/*.h').each { |file|
  if File.file?(file)
    s = File.read(file)
    t = s.gsub(/^namespace .+ \{\n\s*class .*;\n\s*\}.*$/) { |m| m.gsub(/\n\s*/, ' ').gsub(/\s*\/\/.*$/, '') }
    if t != s
      puts file
      File.open(file, 'w').write(t)
    end
  end
}

Change-Id: Iffcb966e90eb8e1a625eccd5dd0b94f000ae368e
Reviewed-by: hjk <hjk121@nokiamail.com>

src/plugins/macros/findmacrohandler.h

@@ -34,9 +34,7 @@
 
 #include <coreplugin/find/textfindconstants.h>
 
-namespace Core {
-class IEditor;
-}
+namespace Core { class IEditor; }
 
 namespace Macros {
 namespace Internal {

src/plugins/macros/macrooptionswidget.h

@@ -45,9 +45,7 @@ namespace Internal {
 
 class MacroSettings;
 
-namespace Ui {
-    class MacroOptionsWidget;
-}
+namespace Ui { class MacroOptionsWidget; }
 
 class MacroOptionsWidget : public QWidget {
     Q_OBJECT

src/plugins/macros/savedialog.h

@@ -35,9 +35,7 @@
 namespace Macros {
 namespace Internal {
 
-namespace Ui {
-    class SaveDialog;
-}
+namespace Ui { class SaveDialog; }
 
 class SaveDialog : public QDialog
 {

src/plugins/macros/texteditormacrohandler.h

@@ -32,13 +32,9 @@
 
 #include "imacrohandler.h"
 
-namespace Core {
-class IEditor;
-}
+namespace Core { class IEditor; }
 
-namespace TextEditor {
-class ITextEditor;
-}
+namespace TextEditor { class ITextEditor; }
 
 namespace Macros {
 namespace Internal {