Core: Remove Core::Id(QByteArray) constructor

This was mostly used to disambiguate the char * and the QString
constructors.

Change-Id: Ib6923ef8e8c0e5d514a883e73aa001a1cd9fb534
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/cmakeprojectmanager/cmakeproject.cpp

@@ -1349,4 +1349,3 @@ void CMakeBuildTarget::clear()
     title.clear();
     library = false;
 }
-