Fixes: - Multiple pro/pri entries in locator project filters

Task:     - 238352
Details:  - Since a while now, pro and pri files are directly part of a
project's file list.

src/plugins/qt4projectmanager/qt4project.cpp

@@ -566,7 +566,6 @@ QStringList Qt4Project::files(FilesMode fileMode) const
         if (fileMode == AllFiles)
             files += m_projectFiles->generatedFiles[i];
     }
-    files += m_projectFiles->proFiles;
     return files;
 }