Avoid warning on empty expressions

For some reason, Q_UNUSED includes already a semicolon, adding one
on the user side creates an additional empty statement.

Change-Id: I9c5e8fac381345a60792cb75e2938fd53958d3b0
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/cpptools/baseeditordocumentparser.cpp

@@ -55,7 +55,7 @@ BaseEditorDocumentParser::BaseEditorDocumentParser(const QString &filePath)
     : m_filePath(filePath)
 {
     static int meta = qRegisterMetaType<ProjectPartInfo>("CppTools::ProjectPartInfo");
-    Q_UNUSED(meta);
+    Q_UNUSED(meta)
 }
 
 BaseEditorDocumentParser::~BaseEditorDocumentParser() = default;

src/plugins/cpptools/cppmodelmanager_test.cpp

@@ -1009,7 +1009,7 @@ void CppToolsPlugin::test_modelmanager_renameIncludes()
     struct ModelManagerGCHelper {
         ~ModelManagerGCHelper() { CppModelManager::instance()->GC(); }
     } GCHelper;
-    Q_UNUSED(GCHelper); // do not warn about being unused
+    Q_UNUSED(GCHelper) // do not warn about being unused
 
     TemporaryDir tmpDir;
     QVERIFY(tmpDir.isValid());
@@ -1055,7 +1055,7 @@ void CppToolsPlugin::test_modelmanager_renameIncludesInEditor()
     struct ModelManagerGCHelper {
         ~ModelManagerGCHelper() { CppModelManager::instance()->GC(); }
     } GCHelper;
-    Q_UNUSED(GCHelper); // do not warn about being unused
+    Q_UNUSED(GCHelper) // do not warn about being unused
 
     TemporaryDir tmpDir;
     QVERIFY(tmpDir.isValid());

src/plugins/cpptools/headerpathfilter.cpp

@@ -86,8 +86,8 @@ QString clangIncludeDirectory(const QString &clangVersion, const QString &clangR
 #ifndef UNIT_TESTS
     return Core::ICore::clangIncludeDirectory(clangVersion, clangResourceDirectory);
 #else
-    Q_UNUSED(clangVersion);
-    Q_UNUSED(clangResourceDirectory);
+    Q_UNUSED(clangVersion)
+    Q_UNUSED(clangResourceDirectory)
     return CLANG_RESOURCE_DIR;
 #endif
 }