Fix warning about unused variable

Change-Id: I2699fdab3b8a586e61270d4853121c131b2a0ebf
Reviewed-by: David Schulz <david.schulz@digia.com>

src/plugins/cppeditor/cppquickfix_test.cpp

@@ -289,7 +289,6 @@ void TestCase::run(CppQuickFixFactory *factory, int resultIndex)
         qDebug() << "Quickfix was not triggered";
 
     // Compare all files
-    const int testFilesCount = testFiles.size();
     foreach (const TestDocumentPtr testFile, testFiles) {
         // Check
         QByteArray result = testFile->editorWidget->document()->toPlainText().toUtf8();