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/libs/qmljs/qmljsbundle.h

@@ -39,9 +39,7 @@
 
 QT_FORWARD_DECLARE_CLASS(QTextStream)
 
-namespace Utils {
-class JsonObjectValue;
-}
+namespace Utils { class JsonObjectValue; }
 
 namespace QmlJS {
 

src/libs/qmljs/qmljsicontextpane.h

@@ -37,9 +37,7 @@
 #include <qmljs/qmljsdocument.h>
 #include <qmljs/parser/qmljsastfwd_p.h>
 
-namespace TextEditor {
-class BaseTextEditor;
-} //TextEditor
+namespace TextEditor { class BaseTextEditor; }
 
 namespace QmlJS {
 

src/libs/qmljs/qmljsimportdependencies.h

@@ -50,9 +50,7 @@ QT_END_NAMESPACE
 
 namespace QmlJS {
 class ImportInfo;
-namespace Internal {
-class ImportDependenciesPrivate;
-}
+namespace Internal { class ImportDependenciesPrivate; }
 class ImportDependencies;
 
 // match strenght wrt to the selectors of a ViewerContext

src/libs/qmljs/qmljsmodelmanagerinterface.h

@@ -41,9 +41,7 @@
 #include <QStringList>
 #include <QPointer>
 
-namespace ProjectExplorer {
-    class Project;
-}
+namespace ProjectExplorer { class Project; }
 
 namespace QmlJS {
 

src/libs/qmljs/qmljsscopebuilder.h

@@ -44,9 +44,7 @@ class ObjectValue;
 class Value;
 class ScopeChain;
 
-namespace AST {
-    class Node;
-}
+namespace AST { class Node; }
 
 class QMLJS_EXPORT ScopeBuilder
 {