Removing extra namespace \Core

core/API/DataTableGenericFilter.php

core/API/DataTableManipulator/LabelFilter.php

core/API/DocumentationGenerator.php

core/API/Proxy.php

core/API/Request.php

core/API/ResponseBuilder.php

core/Access.php

core/Archive.php

core/ArchiveProcessor.php

core/ArchiveProcessor/Period.php

core/ArchiveProcessor/Rules.php

core/AssetManager.php

core/CacheFile.php

core/Common.php

core/Config.php

core/Controller.php

core/Controller/Admin.php

core/Cookie.php

core/DataAccess/ArchiveSelector.php

core/DataAccess/ArchiveTableCreator.php