Remove unused private members [tools]

Apple Clang 4.2 caught private members that aren't used in a class
with no friends. Since this code is in a tool, there's no binary
compatibility requirement.

databaseinfo.h:71:13: error: private field 'driver' is not used [-Werror,-Wunused-private-field]
quoter.h:86:10: error: private field 'validRegExp' is not used [-Werror,-Wunused-private-field]
qmlvisitor.h:123:11: error: private field 'tree' is not used [-Werror,-Wunused-private-field]

Change-Id: Iba9995f28ddef983c9ffc1dc551f042539252704
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/tools/qdoc/qmlvisitor.h

@@ -120,7 +120,6 @@ private:
     QSet<QString> commands;
     QSet<QString> topics;
     QSet<quint32> usedComments;
-    Tree *tree;
     InnerNode *current;
 };
 

src/tools/qdoc/quoter.h

@@ -83,7 +83,6 @@ private:
                                int unindent = 0);
 
     bool silent;
-    bool validRegExp;
     QStringList plainLines;
     QStringList markedLines;
     Location codeLocation;

src/tools/uic/databaseinfo.cpp

@@ -46,8 +46,7 @@
 
 QT_BEGIN_NAMESPACE
 
-DatabaseInfo::DatabaseInfo(Driver *drv)
-    : driver(drv)
+DatabaseInfo::DatabaseInfo()
 {
 }
 

src/tools/uic/databaseinfo.h

@@ -53,7 +53,7 @@ class Driver;
 class DatabaseInfo : public TreeWalker
 {
 public:
-    DatabaseInfo(Driver *driver);
+    DatabaseInfo();
 
     void acceptUI(DomUI *node);
     void acceptWidget(DomWidget *node);
@@ -68,7 +68,6 @@ public:
     { return m_fields.value(connection); }
 
 private:
-    Driver *driver;
     QStringList m_connections;
     QMap<QString, QStringList> m_cursors;
     QMap<QString, QStringList> m_fields;

src/tools/uic/uic.cpp

@@ -67,7 +67,6 @@ Uic::Uic(Driver *d)
      : drv(d),
        out(d->output()),
        opt(d->option()),
-       info(d),
        externalPix(true)
 {
 }