Remove less informative error.

The python error is already set by device_malloc and it contain more information.

Remove less informative error.
98afabeb · Frederic · 612907d2 · 98afabeb
--- a/theano/sandbox/cuda/cuda_ndarray.cuh
+++ b/theano/sandbox/cuda/cuda_ndarray.cuh
@@ -386,8 +386,6 @@ static int CudaNdarray_alloc_contiguous(CudaNdarray *self, const int nd, const i
        CudaNdarray_set_nd(self, -1);
        self->data_allocated = 0;
        self->devdata = 0;
-        PyErr_SetString(PyExc_RuntimeError,
-                        "Could not allocate memory on device");
        return -1;
    }
    if (0)