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/genericprojectmanager/genericproject.cpp

@@ -99,8 +99,8 @@ public:
 
     bool reload(QString *errorString, ReloadFlag flag, ChangeType type) override
     {
-        Q_UNUSED(errorString);
-        Q_UNUSED(flag);
+        Q_UNUSED(errorString)
+        Q_UNUSED(flag)
         if (type == TypePermissions)
             return true;
         m_project->refresh(m_options);