Fixed problematic __str__ method and useless declarations in the

OBI_Nuc_Seq_Stored class

python/obitools3/obidms/_obiseq.pxd

@@ -21,10 +21,6 @@ cdef class OBI_Nuc_Seq(OBI_Seq) :
 
 
 cdef class OBI_Nuc_Seq_Stored(OBIView_line) :
-    cdef str id
-    cdef str description
-    cdef str sequence
-
     cpdef set_id(self, str id)
     cpdef get_id(self)
     cpdef set_description(self, str description)

python/obitools3/obidms/_obiseq.pyx

@@ -65,8 +65,8 @@ cdef class OBI_Nuc_Seq_Stored(OBIView_line) :
     cpdef get_sequence(self) :
         return self[bytes2str(NUC_SEQUENCE_COLUMN)]
     
-    def __str__(self) :
-        return self[bytes2str(NUC_SEQUENCE_COLUMN)]    # or not
+#    def __str__(self) :
+#        return self[bytes2str(NUC_SEQUENCE_COLUMN)]    # or not
     
 #    cpdef str reverse_complement(self) :    TODO in C ?
 #        pass