Remove scm

• Remove scm linked to gitlab_shared_files#6
• Add url to python package linked to aidge#182 (closed)

aidge_backend_opencv/__init__.py

 # Example 1: import .so generated by PyBind
 import aidge_core
-from aidge_backend_opencv.aidge_backend_opencv import *
+from aidge_backend_opencv.aidge_backend_opencv import * # import so generated by PyBind