Move concept out of ::CGAL:: namespace

Optimal_bounding_box/doc/Optimal_bounding_box/Concepts/OrientedBoundingBoxTraits.h

@@ -1,5 +1,3 @@
-namespace CGAL {
-
 /*!
 \ingroup PkgOptimalBoundingBoxConcepts
 \cgalConcept
@@ -36,5 +34,3 @@ public:
   /// Returns the unitary matrix `Q` obtained in the QR-decomposition of the matrix `m`.
   Matrix get_Q(const Matrix& m) const;
 };
-
-} // namespace CGAL

Optimal_bounding_box/doc/Optimal_bounding_box/PackageDescription.txt

@@ -40,7 +40,7 @@ that are used in this package.
 
 \cgalCRPSection{Concepts}
 
-- `CGAL::OrientedBoundingBoxTraits`
+- `OrientedBoundingBoxTraits`
 
 \cgalCRPSection{Classes}