Updated external_usm_allocation example

Author: oleksandr-pavlyk

examples/pybind11/external_usm_allocation/README.md

@@ -7,9 +7,9 @@ to dpctl.memory entities using `__sycl_usm_array_interface__`.
 
 # Building extension
 
-```
+```bash
 source /opt/intel/oneapi/compiler/latest/env/vars.sh
-CXX=dpcpp CC=dpcpp python setup.py build_ext --inplace
+CXX=icpx CC=icx python setup.py build_ext --inplace
 python -m pytest tests
 python example.py
 ```

examples/pybind11/external_usm_allocation/external_usm_allocation/_usm_alloc_example.cpp

@@ -134,9 +134,6 @@ py::list tolist(DMatrix &m)
 
 PYBIND11_MODULE(_external_usm_alloc, m)
 {
-    // Import the dpctl extensions
-    import_dpctl();
-
     py::class_<DMatrix> dm(m, "DMatrix");
     dm.def(py::init(&create_matrix),
            "DMatrix(dpctl.SyclQueue, n_rows, n_cols)");