CMake/Qbs: Do not emit Project::fileListChanged()

...explicitly.
This is already done as part of Project::setRootProjectNode(), and the
signal is connected to some rather expensive operations.

Task-number: QTCREATORBUG-18533
Change-Id: I96ea2f49c866f2b60f599748c4d5b82c790ed2ca
Reviewed-by: hjk <hjk@qt.io>

src/plugins/cmakeprojectmanager/cmakebuildsystem.cpp

@@ -481,8 +481,6 @@ void CMakeBuildSystem::updateProjectData()
         updateQmlJSCodeModel();
     }
 
-    emit p->fileListChanged();
-
     emit m_buildConfiguration->emitBuildTypeChanged();
 
     m_buildDirManager.resetData();