remove stringbuilder autotests

It was merged to Qt master a while ago.
(cherry picked from commit bfc49c0e)

src/plugins/debugger/gdb/gdbengine.cpp

@@ -1196,7 +1196,8 @@ void GdbEngine::handleAsyncOutput(const GdbMi &data)
                         .arg(name.isEmpty() ? tr(" <Unknown> ") : _(name))
                         .arg(meaning.isEmpty() ? tr(" <Unknown> ") : _(meaning));
                     QMessageBox *mb = new QMessageBox(QMessageBox::Information,
-                        tr("Signal received"), msg);
+                        tr("Signal received"), msg, QMessageBox::NoButton,
+                        q->mainWindow());
                     mb->setAttribute(Qt::WA_DeleteOnClose);
                     mb->show();
                 }

tests/auto/qstringbuilder/qstringbuilder.pro

-load(qttest_p4)
-SOURCES  += tst_qstringbuilder.cpp
-
-QT -= gui
-
-QT = core
-
-DEFINES += QT_NO_CAST_TO_ASCII
-
-
-

tests/auto/qstringbuilder/tst_qstringbuilder.cpp

-/****************************************************************************
-**
-** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Nokia Corporation (qt-info@nokia.com)
-**
-****************************************************************************/
-
-#include <QtTest/QtTest>
-#include "../../../src/libs/utils/qstringbuilder.h"
-
-//TESTED_CLASS=QStringBuilder
-//TESTED_FILES=qstringbuilder.h
-
-class tst_QStringBuilder : public QObject
-{
-    Q_OBJECT
-
-public:
-    tst_QStringBuilder();
-    ~tst_QStringBuilder() {}
-
-public slots:
-    void init() {}
-    void cleanup() {}
-
-private slots:
-    void operator_percent();
-};
-
-
-tst_QStringBuilder::tst_QStringBuilder()
-{
-    //QTextCodec::setCodecForLocale(QTextCodec::codecForName("ISO 8859-1"));
-}
-
-void tst_QStringBuilder::operator_percent()
-{
-    QLatin1Literal l1literal("a literal");
-    QLatin1String l1string("a literal");
-    QLatin1Char l1char('c');
-    QChar qchar(l1char);
-
-    QCOMPARE(QString(l1literal % l1literal), QString(l1string + l1string));
-}
-
-QTEST_APPLESS_MAIN(tst_QStringBuilder)
-
-#include "tst_qstringbuilder.moc"