removed some cruft

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%403989

dlib/matrix/symmetric_matrix_cache_abstract.h

@@ -54,46 +54,6 @@ namespace dlib
                       entire row/column/diagonal worth of data.  
     !*/
 
-// ----------------------------------------------------------------------------------------
-
-    template <typename EXP>
-    struct colm_exp
-    {
-        typedef matrix_op<op_colm<EXP> > type;
-    };
-
-    template <typename EXP>
-    struct rowm_exp
-    {
-        typedef matrix_op<op_rowm<EXP> > type;
-    };
-
-    template <typename EXP>
-    struct diag_exp
-    {
-        typedef matrix_op<op_diag<EXP> > type;
-    };
-
-// ----------------------------------------------------------------------------------------
-
-    template <typename EXP, typename cache_element_type>
-    struct colm_exp<matrix_op<op_symm_cache<EXP, cache_element_type> > >
-    {
-        typedef matrix_op<op_colm_symm_cache<EXP, cache_element_type> > type;
-    };
-
-    template <typename EXP, typename cache_element_type>
-    struct rowm_exp<matrix_op<op_symm_cache<EXP, cache_element_type> > >
-    {
-        typedef matrix_op<op_rowm_symm_cache<EXP, cache_element_type> > type;
-    };
-
-    template <typename EXP, typename cache_element_type>
-    struct diag_exp<matrix_op<op_symm_cache<EXP, cache_element_type> > >
-    {
-        typedef matrix_op<op_colm_symm_cache<EXP, cache_element_type> > type;
-    };
-
 // ----------------------------------------------------------------------------------------
 
 }